Good afternoon everyone and welcome to our live game-by-game coverage as Spain's 20th seed Garbine Muguruza takes on number 15 seed Timea Bacsinszky from Switzerland in the women's quarter-finals of Wimbledon.

These two ladies will be doing battle on Court One, which has just seen Novak Djokovic scrape past Kevin Anderson after an epic five-set battle.

Muguruza starts strongly off her own service as she forces Bacsinszky into two consecutive errors to move the score to 30-0. The towering Spaniard takes the next point as her opponent can only scrape a backhand return into the net. Bacsinszky hits back with a commanding forehand winner before delivering a superb backhand to draw deuce. Bacsinszky doesn't do herself any favours next up, though, as she produces poor work on the backhand to give Muguruza the advantage. Deuce is reached again when the Swiss players comes up with a strong effort on the backhand, but then throws the game away with two straight errors.

Consecutive errors from both players leave the scores at 30-30 on Bacsinszky's serve. The Switzerland star pulls out in front as she forces Muguruza into a forehand error with a swipe into the net. Bacsinszky serves well and her opponent's return has too much on it as it flies beyond the baseline.

Muguruza comes up with strong work on both the fore and the backhand and she soon takes a 40-0 lead following a wonderful point won on the volley that sends Bacsinszky running in the wrong direction. Bacsinszky is given a route back into the game with a standout winner on the backhand, but eventually loses out to Muguruza who ends things by forcing her competitor into another error.

Muguruza struggles as she is unable to return, and her opponent then delivers two memorable winners on the backhand to set up a win in the fourth game. Bacsinszky cements things by forcing Muguruza to fire her return too far beyond the baseline.

The backhand is proving effective for Bacsinszky and after some early errors she draws parity with the Spaniard with an effective thump across the face of the court. Bacsinszky continues to apply the pressure and Muguruza hands over break point when she fires into the net at close range. The Spaniard doesn't give up though and wrestles back deuce by forcing her opponent to throw a shot high and wide from the baseline. Muguruza gains advantage, but then concedes deuce with a forehand error. Bacsinszky takes the lead for a second time with a backhand winner to setup a break point. The Swiss star then drops it as Muguruza rushes the net and cuts one over to score. The Spanish star eventually holds her serve to win the game when Bacsinszky fails to return, once on the forehand and then on the backhand.

Muguruza holds an early lead after a mistake from Bacsinszky, who is then undone be a telling backhand from the Spaniard who holds control at 30-0. Bacsinszky comes back into it by forcing Muguruza into consecutive errors on the forehand. The errors continue for the 20th seed and Bacsinszky takes the game following two mistakes on the back and forehand.

Back on her own serve, Muguruza takes an early lead when Bacsinszky chops her return low into the net from the baseline. After a bit of a rally, Bacsinszky comes up short again when she fires wide of the court with her backhand. The game is soon left at 40-0 when the Swiss player needlessly chops wide again, this time with the forehand. Muguruza tries to go on the attack at the net, but her rushed shot proves too long and flies beyond the back of the court. The Spaniard soon closes proceedings out with a pummelling shot as she opens up on the forehand.

Bacsinszky's opening serve disappoints as she is forced to concede off the backhand. Next up is a poor double fault that gives Muguruza a 30-0 lead. Bacsinszky comes back into it by pushing the Spaniard into two errors on the backhand. More great pressure from the Swiss player sees Muguruza send another backhand high and beyond the baseline, leaving Bacsinszky to take the game with a superb forehand volley towards an empty corner at the back of the court.

Not the best of starts from Muguruza who is undone when she chops wide following a short rally. Her next serve is a good one, but she fails again by sending a bullet into the net when the point is most definitely on. The scores are soon level, though, with Muguruza producing good work on the backhand to undo Bacsinszky's promising start. The game is won when Muguruza sends a forehand beyond the reach of her opponent having rushed the net with real force.

Bacsinszky is looking hold serve to stay in the first set and she obliges with a good first serve that Muguruza comedically sends into the crowd. The Spanish player hits one a little too long on the attack to draw the scores level, before Bacsinszky takes a 40-0 lead by forcing a backhand error. The game is completed as Muguruza is unable to put a return on a strong serve from Muguruza. Both players are mixing their serves well in this contest.

An early forehand error on the return from Bacsinszky hands Muguruza an advantage, but sloppy play from both players sees the scores level at 30-30. Muguruza moves ahead when Bacsinszky can't quite make the return on the forehand, before the Spaniard takes the game with a well-planned winner using a forehand of her own.

SET! Mistakes from both players leave the scores at 30-30 after four serves, but Bacsinszky comes up strong to take the advantage with a splendid ace beyond her opponent. The scores are then brought to deuce when Muguruza pushes her opposite number into attacking straight into the net. The Spaniard moves out in front to establish a set point, which is confirmed when Bacsinszky sends a woeful lob long and wide on the return from a powerful backhand.

BREAK! Muguruza gets the second set underway, but Bacsinszky claims the opening point by forcing a backhand error. The Spaniard responds by drawing things level, but can't follow through as she sends a terrible shot into the net from close range. An impressive rally concludes when Muguruza shoots long to establish a break point for Bacsinszky, and she takes it by forcing her opponent long down into the corner.

BREAK! Muguruza seeks to break back by establishing a 30-15 lead with a strong backhand winner at the net with her opponent stuck down in the corner. The Spaniard then has a break point of her own when Bacsinszky powers a flat shot into the mesh. Muguruza seizes her chance as Bacsinszky goes for the drops shot but finds the net yet again.

The Spaniard applies lots of pressure early on and she cruises through to a 40-15 lead as Bacsinszky makes far too many errors on the return. Muguruza seals the game when her opponent can only force her backhand attempt straight into the net.

Bacsinszky gets a little lucky to open the scores when her shot hits the net and falls just short of an on-rushing Muguruza. Parity is drawn when Bacsinszky fails on the forehand, but her Spanish opponent also comes up short with a forehand that flies beyond the baseline. The mistake doesn't get to Muguruza too much and she comes back with a powerful forehand winner. Bacsinszky eventually holds strong, though, and closes the game out with an ace.

The players' service games are holding strong at the moment and Muguruza takes a 30-15 lead by forcing her opponent onto the back foot. The number 20 seed can't keep up the pressure, however, and Bacsinszky draws the scores level. Muguruza then double faults to setup the break point, but pushes back for deuce. The 21-year-old saves the break point and takes the game by forcing two consecutive errors.

The first serve in the sixth sets up an intense rally that Bacsinszky eventually takes thanks to some help from the net. The point is the start of an unchallenged push from the Swiss player who moves unopposed to 40-0. Muguruza does get one point in, but then loses out to a clever backhand down the line.

A wonderful forehand clobber brings Muguruza level at 15-15, before the scores move to 30-30 following errors from both players. Muguruza goes 40-30 ahead with a standout winner on the forehand, before taking the game by forcing Bacsinszky to send her reply into the net on the backhand.

BREAK! Pressure from Muguruza now as she takes the opening point and asks the question of Bacsinszky's forehand. The Swiss player responds when the Spaniard fires wide and fails on a challenge. Muguruza moves forward on the attack and strikes with a tasty forehand that rockets down the line to give her the edge. Break point is established when Bacsinszky chips into the net, before the Swiss delivers a wonderful chip. Muguruza eventually takes the break when she comes up with a stunner of backhand to hammer the ball down into the corner.

GAME, SET & MATCH! Muguruza produces two great winners, first on the backhand and then on the service to hold a 30-15 lead. The youngster then puts real power into her shot to force Bacsinszky into backhand error, which leaves the Spaniard with two match points. Muguruza delivers at the second time of asking when her bullet of a backhand has far too much for Bacsinszky.

Wonderful stuff from Muguruza, who now becomes the first Spanish lady to reach the semi-final of Wimbledon for 18 years. The 21-year-old shone with her attacking play on the backhand and that power has proved to be the difference this afternoon.

Muguruza will now face the winner of the clash between Madison Keys and Agnieszka Radwanska later on this afternoon. We'll be bringing you live game-by-game coverage of that clash too. If you fancy keeping tabs on the other women's quarter-final currently taking place between Maria Sharapova and Coco Vandeweghe, you can find our coverage here.

That's going to be all from us in terms of this fixture, but do keep an eye out as I'll be taking you part way through the clash between Keys and Radwanska. You can find that commentary and the rest of our coverage over at our dedicated Wimbledon section.