Live Commentary: Roger Federer vs. Grega Zemlja - as it happened

World number seven Roger Federer advanced into the second round of the US Open with a straight-sets win over Grega Zemlja.

Federer was immaculate on serve and was broken only once - late in the third as he served for the match.

However, aside from that blip, Federer was in command throughout and eased through with a 6-3 6-2 7-5 win.

Read how the action unfolded with our live text commentary below.

10.13pmThanks for joining me for this tonight, and be sure to stick around for all our US Open coverage over the next two weeks. Goodbye.

10.11pmFederer is through to the second round with what was a pretty comfortable win. He did not need to be at his best, but at times he was and at those times had far, far too much for Zemlja.

Federer 6-3 6-2 7-5 ZemljaGAME, SET & MATCH FEDERER

10.10pmMagnificent stuff from Fed. He comes to the net to plant a volley way out of reach and has three match points...

Federer 6-3 6-2 *6-5 ZemljaBREAK! He gets it, and he surely won't pass up the second chance to serve this one out. We're just shy of an hour and a half and this has been a good test for the world number seven.

10.07pmBreak point Federer now, and on second serve...

10.06pmIt's 15-30 here as Fed senses a chance, but Zemlja gets a fine serve down the middle that is returned wide.

Federer 6-3 6-2 5-5* ZemljaYes, he can. To love. "Your move, Grega," he might have said there.

Federer 6-3 6-2 *4-5 ZemljaA double fault is a hiccup, but he responds with a big serve and is now in command in the closing stages of the third set. Can Roger respond with a big service game?

10pmA second wind for Zemlja. He's raced 40-0 up on serve.

Federer 6-3 6-2 4-4* ZemljaBREAK BACK! Well, that wasn't in the script. Federer changes his racquet in the break needing another break with us being back on serve.

9.57pmThe Slovenian nets and we're back to deuce.

9.56pmIt's the first time here that Federer's serve has been taken to deuce. And now it's advantage Zemlja after a double...

Federer 6-3 6-2 *4-3 ZemljaBREAK! How has Roger won that final point? He's on the defensive with a series of slices, before forcing Zemlja to net with a brilliant backhand into his body. Great play and as I thought the perfect time to break. Not long left in this one now.

9.50pmBrilliant save! Zemlja executes the perfect drop shot into the corner to save break point.

9.49pmBreak point for Federer... Another magnificent volley stopping the ball dead at the other side.

9.49pmGreat time for a big ace there and one point is clawed back. Federer leaves a second serve, but it clipped the line and we're at 30-30.

9.48pmIndeed he goes up 0-30 here. Big moment for the Slovenian...

Federer 6-3 6-2 3-3* ZemljaThey're going punch-for-punch at the moment. Federer holds without too much fuss. Here's where he usually turns it on...

9.46pmBig forehand from Federer to move up 40-15. Zemlja just didn't move.

Federer 6-3 6-2 *2-3 ZemljaZemlja could easily have rolled over after losing that second set, but no. He's battled back and is now fully on top of his own service games as well as winning points on Fed's. You expect the Swiss to step up shortly, though, should he hold here.

Federer 6-3 6-2 2-2* ZemljaBut that's what Federer is all about. He regroups and claims the game with a couple of good first serves.

9.39pmThis is much better from the Slovenian, who is really getting into the rallies. He goes 15-30 up when Fed nets, and here's a sniff.

Federer 6-3 6-2 *1-2 ZemljaA huge slice of luck there from Zemlja, who clips the net and sees the ball go just the other side. He worked for it, but holds again to stay ahead in the set.

9.34pmMagic from Fed. Again Federer reacts so quickly at the net. Zemlja hammered it to Federer from the back of the court, but he had soft enough hands to win the point on the backhand.

9.32pmBrilliant from the Swiss. He comes to the net and gets the ball from under it back over and down the other side in one fluid motion. He made it look easy.

Federer 6-3 6-2 *0-1 ZemljaFederer battles back to 40-30, but a nice one-two with a forehand winner from the Slovenian gets him off the mark in the set.

9.30pmGood start to his next service game from Zemlja, who races 40-0 up, the last point a big ace down the middle.

Federer 6-3 6-2 0-0* ZemljaSET! He's two sets up in 48 minutes after yet another hold to love. This is only going one way and Federer's serve really has been impressive. Absolutely solid.

9.26pmIt's all going to script so far, as Zemlja hits three returns wide.

Federer 6-3 *5-2 ZemljaBREAK! Another break at a key time for Fed, as if he dictated it to be like this. In just 46 minutes he is serving for a second set.

Federer 6-3 4-2* ZemljaNot this time. If Zemlja manages a return, he's always second favourite in the point. Fed moves untroubled to 4-2.

Federer 6-3 *3-2 ZemljaHis last two service games have been good, as he wraps that one up to 30. But Zemlja needs to make a dent in Federer's, which has been flawless so far.

9.17pmLovely. A drop shot from behind the baseline and Zemlja cannot reach it to make it 15-15.

Federer 6-3 3-1* ZemljaReally well timed serve and volley from Federer, who caught the Slovenian off guard. He wraps up another service game to love with an ace. There has been no threat to his serve today at all.

Federer 6-3 *2-1 ZemljaFantastic volley from Federer, who snuck on his opponent's blindside to win the point. However, a big serve is not returned and Zemlja has his first game in six.

9.12pmAn early double fault won't help, but he again comes to the net well to slam a winner off the backhand for 30-15.

Federer 6-3 2-0* ZemljaEasy as you like, Federer consolidates his break and moves 2-0 ahead. Zemlja must stop the rot of games.

9.11pmYet again Zemlja loses a point after slicing off the side of his racquet. He needs a bigger one as Federer moves 40-15 ahead and is in control now.

Federer 6-3 *1-0 ZemljaBREAK! Brilliant from Fed, who comes to the net aggressively and forces the error. He now has two breaks from five opportunities and four straight games.

9.07pmWe're at deuce here for only the second time in the match. Break point Federer as his opponent nets...

9.06pmZemlja has to hold here really to keep things in his hands. However, another fault brings the score to 15-30.

Federer 6-3 0-0* ZemljaSET! Brilliant net play Federer. His swift reactions are on the money, with Zemlja going long and the set is finished off with an ace.

9.02pmAgain the ball comes off Zemlja's frame, as Federer moves 30-0 up.

Federer *5-3 ZemljaBREAK: He's not slipping up there. Fine forehand kisses the line to break at the ideal moment. He now serves for the first set.

9.01pmHe's in trouble now, though, with a failed smash that goes into the crowd before the court. Two break points Fed...

9pmServe and volley for Zemlja there as he takes the opening point of his next service game.

Federer 4-3* ZemljaFederer really doesn't want to hang about on serve. Zemlja finally wins a point on the Fed serve, but the Swiss responds with an ace into the corner - his fifth. Whoosh. The Federer forehand in full swing there as he takes the game with his eighth winner. He's unplayable when shots like that are working.

Federer *3-3 ZemljaHe doesn't, and Zemlja wraps up another service game. Nothing giving in so far for either player.

8.54pmAt 30-15, however, a second double fault brings us level. Danger here if Fed can get the next point.

8.53pmSo far so good. A couple of big serves are returned out of court and the Slovenian is 30-0 up.

Federer 3-2* ZemljaHold to love for Federer brings Zemlja right back on serve. If he cannot win points against serve the pressure will begin to build. For now, though, he's been solid with the balls.

8.50pmFederer responds with a very good ace down the T, for his second of the match.

Federer *2-2 ZemljaGood hold from the Slovenian, who has a powerful serve that Fed is struggling to return if he gets it in. The final effort was 126mph, which brings him the game. Good start from him.

8.47pmHe's incredibly reluctant to move from the back of the court, Zemlja, which backfires as he eventually goes long for 15-15.

Federer 2-1* ZemljaRapid hold from Federer, who has his service game fully in action now. Just seven minutes in and we've already got through three games - and one of them had break points.

Federer *1-1 ZemljaAnd with those couple of break points saved, Zemlja holds. A nervy start, but he took the game which is the important thing.

8.43pmHe's done well to battle back to deuce, with Federer pressured into a long forehand that came off the frame.

8.41pmA double fault from Zemlja puts him in a little bit of trouble at 0-30.

Federer 1-0* ZemljaAside from that early setback, that's comfortable for Fed, who comes through without dropping another point.

8.39pmIndeed it can, as he finally gets a serve in before stepping in to a forehand winner, which he follows up with an ace down the middle.

8.38pmFederer's start? A double fault. It can only get better from here...

8.37pmThis game was due to be played last night, but rain hit just before they were due to start so they have had to wait until now. The warmups are almost over now, and we'll be underway very shortly.

8.34pmIn his way stands 62nd-ranked Grega Zemlja. They have previously met twice, with Roger winning both. In February this year in Rotterdam, the Swiss won 6-3 6-1. He does appear to be on an upward curve, too, with his third round at Wimbledon his best Slam performance to date.

8.31pmHowever, he clearly has the desire to return to the top. Can he do it? It's hard to say, but it has to be said that it looks unlikely. He can make a statement with an emphatic win tonight, and if he is still here in week two then that's the first part of the battle won.

8.28pmMany people - including John McEnroe - are convinced that the once unbeatable Federer will never win another Grand Slam. He has dropped to seventh in the world and Wimbledon was the only time in the past nine years he failed to reach a Slam quarter-final.

8.23pmThis is the third match on Arthur Ashe court tonight, with two more still to come. It's all very busy on day two. Today's crowd has already seen Petra Kvitova beat Misaki Doi in three sets and Caroline Woznacki get through a tough encounter with Duan Ying-Ying just now. It's time for the first of today's two main events.

8.20pmHello all and thanks for joining me tonight as Roger Federer opens his 2013 US Open account against Grega Zemlja of Slovenia.

Live Commentary: Roger Federer vs. Grega Zemlja - as it happened

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