Donald Young has said that he is working on his emotions as he prepares to face Stanislas Wawrinka in the fourth round of the US Open on Monday.

Young's stock has risen at Flushing Meadows following his progression to round four and it has been questioned whether he has the temperament to deal with what comes in the latter stages of Grand Slams.

Young has admitted that his emotions are all over the place, but is confident that he will have his mind in check for his fourth-round match-up.

"I'm trying to work on being a little more even-keeled. But me not showing any emotion is not the best for me. I've tried that. It kind of bottles up, and then at some point explodes," Young told reporters.

"So to let it out every once in a while and not in too-harsh or crazy ways, it's been something that I've been working on. I've been working on the mental part as well. It's definitely improving. It's not where I want it to be, but it's on the way, on the track I want it to be on."

Young beat Viktor Troicki in the third round on Saturday.