Former US Open champion Andy Murray began his campaign for a first Grand Slam title in 2014 against Dutchman Robin Haase this afternoon.
Despite apparently struggling with multiple injuries in the third and fourth sets, Murray came through in four to reach the second round at Flushing Meadows.
Read how it all unfolded in our game-by-game updates below.
Hello there tennis fans! Our first live commentary of this year's US Open involves British number one Andy Murray, who is chasing his first Grand Slam of 2014.
As mentioned above, Murray won't have it easy in New York as he has been seeded eighth. Today he takes on world number 70 Robin Haase and the pair have history at Flushing Meadows.
At the 2011 tournament Murray played Haase at this tournament and needed five sets to beat him. The two have since met at last year's Australian Open, where Murray eased to a straight-sets victory.
After breaking his Slam duck at the 2012 tournament in New York, Murray won Wimbledon last year but is yet to win one of the big four this year. This event offers him the last chance to do so and he will fancy his chances as he enjoys the surface at Flushing Meadows.
We're just about ready to go on Louis Armstrong stadium. Murray, who will serve first, is in a grey top and black shorts with green shoes and sweatbands. Haase keeps it traditional, he's all in white.
The worst start possible for Muzza as he double-faults on the opening point. The next rally is much longer, but won by Murray as Haase nets a forehand.
Murray wins three points on the bounce from 15-30 to hold serve in the opening game. Good enough start, but he will be wary of his opponent's big-hitting that saw him go 15-30 in front.
Incredibly, Haase does exactly the same as Murray on his opening service point with a double-fault. Come on lads, you're professionals!
Poor from Haase as he nets a simple backhand volley to present Murray with THREE BREAK POINTS...
BREAK! And the Scot converts straight away, getting lucky with a net cord that forces Haase into the net before expertly lobbing his opponent.
Murray isn't wasting any time today. He holds to 15 and Haase reallly doesn't look like getting on the scoreboard at the moment.
It's time for @andy_murray at the 2014 @usopen - RT to show Andy your support! #BackTheBrits @SMTennis_.
Haase wins the opening point, but Murray is now 30-15 in front after some hitting right to the lines.
BIG pass from Haase! His backhand down the line is just out of reach for Murray and he's now two points away from the set...
Murray isn't fazed, first delivering an ACE up the middle before Haase wildly slices a backhand miles out. Pressure back on the Dutchman.
What a game from the 27-year-old! By far the best hold of the match as he produces four first serves and wraps up the game with a backhand winner down the line. Over to you, Andy...
Haase is certainly one of the more impatient players I've seen. Once a rally gets past the 10-stroke mark, he seems to think 'right, time for a big'un' and just fires for a winner. It doesn't often work and his latest gung-ho forehand sails out. 15-15.
TIE-BREAK! Murray holds to 15 and we'll have a tie-break to decide the second set.
Awesome point to start as the pair trade incredible shots at the start of the rally before Murray cracks on a simple forehand.
This is great! Murray responds with a gorgeous forehand pass when Haase looked set to earn the first mini-break.
Another superb point, can they just play the whole game as a tie-break please? Murray wins it thanks to some brilliant defence.
MINI-BREAK! First falter of the breaker and it comes from Haase, who nets a weak forehand.
MINI-BREAK! Wowee! Murray goes for broke on the second-serve return and somehow hits an in-to-out backhand on the line. What a shot!
MINI-BREAK! Great response from Haase, who blasts a backhand return of his own up the line that Murray can't return. The duo change ends with Murray one mini-break in front.
ACE from Murray. Haase challenges, but Hawk-Eye shows that the ball landed slap bang on the line.
A dragged backhand from Murray, Haase still in this.
Haase back within one point as he puts a backhand just out of Murray's control.
A tame first serve from Murray, but he comes out on top after Haase lobs long. Two set points for Muzza...
MINI-BREAK! Murray challenges the first serve, but it was out and he then shoots long with a backhand.
Haase roars with delight as he crashes a forehand winner into the open court. He's saved two set points and we're back level in the breaker.
MINI-BREAK! On the line! Murray's inside-out forehand catches the outside edge of the line and it's set point number three for the Scot.
SET! This time he converts as Haase fires just long with his approach. Murray will be over the moon to have come through that set, but it was far from convincing by the two-time Grand Slam champion.
That really was a gripping breaker. Some tantalising tennis from both ends, but Murray's quality just showed in the end. Haase will be really down and you wonder if this third set could be a cruise for Murray.
Murray starts the first game of the third in comfortable fashion, but soon Haase is back in it at deuce. He can't open up a break-point chance though and Murray closes out with his fourth game point.
Murray also takes Haase to deuce, but he, like his opponent, can't make an early breakthrough in the third set.
Some interesting stats from the second set, Haase won six more points!
Total points won: Haase 38-32 Murray
Aces: Haase 4-1 Murray
Double faults: Haase 1-2 Murray
Winners: Haase 13-7 Murray
Unforced errors: Haase 12-12 Murray
Neither man is holding back here in the third game of the third set. Almost every rally is turning into a war of whose hardest shot will be good enough. They're level at 30-30.
Beautifully-placed forehand while moving forward by Haase to bring up break point, but he's denied by Murray's equally pinpoint ACE.
Lazy backhand slice from Murray that doesn't make it over the net and Haase has another break point...
Yet again he is denied as Murray wrongfoots the Dutchman with a forehand at the net. Haase is so angry that he tries to eat his racket. Can't imagine it tastes all that good.
Murray might look fed up at the moment, but when he's producing backhands like that, who cares?! Back to deuce again!
BREAK! Haase finally converts on break point number five and I'm really surprised that Murray isn't running away with this third set.
Murray will want to hit back straight away and that's a nice way to start, manouevering Haase from left to right before flashing a forehand into the corner.
Break-back point for Murray as his backhand is returned long by Haase...
The Scot should be level, but he hits an easy forehand into the tape and doesn't get the luck of the net cord.
Chance wasted by Muzza and he's now two games behind in the third set and still has plenty of work to do. He looks completely uninterested at the moment, but is still producing the odd moment of lethargic magic.
Murray saves a double-break point and needs to get his head sorted quickly otherwise Haase will be winning this set and gaining confidence.
Excellent on-the-reach return from Haase and he has another chance to go a double break in front...
DOUBLE BREAK! Murray shoots long with a backhand and that's now four games in a row for the world number 70.
Murray has now changed into a white t-shirt and is looking far from comfortable in the New York sunshine. Haase just hit a backhand that the Scot would usually go for, but he didn't even consider tracking it down.
Murray's only point there came from a Haase double fault at 40-0. The Scot has given up on this set, but should try to win this next game so that he can serve first in the fourth.
Sluggish forehand into the net from Murray to bring up set point Haase...
SET! And Murray floats over a serve that Haase puts away. Murray has started doing his trademark 'I'm a little injured' face and is now stretching at the change of ends.
Murray seems to have called for the trainer and he might need treatment at the next change of ends. He's back out for the start of the fourth and swats a forehand winner into the corner. He's still not moving well, though. 0-15.
Haase knows that all he has to do is stay calm because Murray's lack of movement means that he can't win enough points for a game. Could the 2012 champion's tournament end at the first round?
The first change of ends in a set is never prolonged, so we'll have to wait until after the third game to see if Murray will request the trainer's assistance.
Murray's serves at the moment are awfully weak, Haase should be attacking every time.
BREAK! Murray moved better at times there, but still couldn't hang on and hold. He looks completely desolate and you wonder if he will carry on for the whole five sets.
That's now nine games on the trot for Haase, and Murray doesn't seem to be interested in getting the trainer out at the change of ends. He's slumped in his chair with a towel on his head.
Haase's backhand return at 30-15 dips just out, but he follows it up with a winner off the return on the next. Murray still with game point...
And he takes it to win his first game for over three quarters of an hour. Despite that, he continues to grimace and hold his groin.
After connecting with a sublime forehand, Haase tells the umpire that he wants to see the trainer! Are both men struggling with injury out there? If so, Haase is handling it better.
Let's see what happens at this change of ends then. Haase is within two games of the fourth set, but is now being treated for what seems to be a left ankle problem.
Murray does look a little better now, but he's still got loads to do if he is going to avoid a fifth set in the first round of the US Open. He's just surrendered a 30-0 advantage and it's 30-30.
Murray wins the next two points to hold and he seems to be a little more upbeat. Can he put some pressure on the Haase serve?
He does, opening up break-back point but Haase saves it with a cool forehand.
Oooh dear, oh no. Murray produces a brilliant backhand winner for another break point, but he appears to have hurt himself in the process.
BREAK BACK! But it doesn't matter! The Scot produces a backhand right to the feet of Haase and, incredibly, we're back on serve in the fourth set!
Murray holds his groin, his quad and then his arm all within a couple of points. How achy can one man be and carry on playing?! 15-40 and two break points for Haase.
BREAK! All that momentum that Murray had from the last game evaporates as his exhausted demeanour returns. Funny old game, this.
See-saw, topsy-turvy. Call it what you like, this match is so hard to call. Murray now with a break-back point...
BREAK BACK! And Haase double faults. What is in the air at the Louis Armstrong court?!
Sometimes Murray's effortlessness can look downright lazy, but when he's like this it's just mesmorising. Corner to corner to corner to corner from the Scot. 40-0.
All square in the fourth as Haase's backhand at 40-30 fails to make it halfway up the net.
Haase tries to force Murray with a drop-shot and it seems to have worked, but he can't make the lob count. Murray grabs his quad in pain, but he's now got two break points...
BREAK! Amazingly, Murray will serve for the match after angrily blasting a high forehand return onto the line for a clean winner at 30-40.
Haase attacks on the return at 15-15 and finds a winner. Two more like that and we'll be in a tie-break.
Terrible forehand from Muzza and Haase has two break-back points...
Murray saves the first with a looping serve out wide that Haase can only hit way long on the return.
Drama! Haase's return is called long, but he challenges and indeed it was in. "Replay the point," says the umpire. Haase is in control and has an easy volley for the break, but puts it into the net.
Another break point for the Dutchman after a gripping point that seemed to last for an age. The second-longest rally of the match.
Murray's shoulder is really hurting on serve now, but somehow he saves the break point with a backhand winner. Can he see this out?
MATCH POINT Murray...
GAME, SET AND MATCH MURRAY! I really don't know how he's come through that fourth set, but Andy Murray is through to the second round of the US Open.
The Scot apologises to Haase at the net for his laboured play, but you have to hand it to him for the way he battled there. Haase will undoubtedly be fuming that he's missed out on the chance to knock out a top seed.
It's time for us to say goodbye, but make sure you stay on Sports Mole throughout the evening for plenty more from Flushing Meadows. We hope you enjoyed that weird match as much as we did! Good evening.
