Muller is under pressure on his serve once more, his first serve percentage down to 64%. Federer rustles up a break point, but Muller saves it with a backhand winner. Back comes Federer, rolling his majestic single-handed backhand cross court to set up another break point. This time, he is gifted the break as Muller double-faults. Fire up the engine chauffeur, Federer will be out in a minute.

Image source, Andre Agassi

Andre Agassi on Twitter:, external HAPPY HOME!!! #WorldCup

USA reached the World Cup knockout stages despite a 1-0 defeat to Germany, who progressed as group winners.

Richard Gasquet,, external the 13th seed who went out to Australia's Nick Kyrgios, has tweeted: Very tough today!! Congratulations to @NickKyrgios for his attitude and victory. Good luck for next round. See you next year @Wimbledon.

Image source, Getty Images

Federer hits the deck, falling quite awkwardly. The Swiss grimaces slightly but then brushes himself off and gets on with the job in hand. Muller is more attacking in this game, but Federer still holds to 30.

Federer takes Muller to deuce but he can't manufacturer a break point and Muller survives another game.

Image source, Wimbledon

The rain may have put a dampener on things but the view remains glorious at the All England Club as proved by this picture tweeted by Wimbledon, external

Another love service game for Federer. The Swiss is in a hurry.

Jeremy Bates
Former British number one on BBC Radio 5 live sports extra

"There had been no chances whatsoever for Federer until those closing shots. Muller was 40-15 on serve but one loose point and all of a sudden Federer's radar is up and he is interested. A few fantastic shots take the set. Those are the fine margins. Really great play from Federer."

Play on all courts other than Centre has been suspended and all un-played matches are cancelled for the day.

Federer brings up set point with a glorious backhand winner and he immediately challenges a call which says his lob dropped long in the next. Hawkeye agrees with the Swiss and they replay the point.

Federer fires a return deep and Muller nets with a backhand to hand the seven-time Wimbledon champion the set. Roof open or closed, it's all going rather well for the Swiss.

Tim Henman
Former British number one on BBC TV

"Muller has got to try and break up Federer's serving rhythm. He has to stand a yard inside the baseline or wide, he's had no impact on this serve so far."

It's another easy service hold for Roger Federer, the Swiss racing through his service game to love. Muller must now serve to stay in the set.

Muller nails a lovely backhand volley to hold serve and level things up again in this set.

Image source, AFP

Federer fires down a 125mph ace and follows it up with a 115mph ace to clinch the first game of these championships to be played under the roof to love. I should add that play has been suspended on all other courts.

*denotes the next to serve

Tim Henman
Former British number one on BBC TV

"Agassi made the US Open final at 35 and Federer is certainly a better athlete than him. While he is still enjoying the whole process he should keep playing as long as he can, and let's hope it's a good few years yet."

The warm up is done and dusted. Let the game begin. Again.

If you missed BBC Radio 5 live's 6-love-6 with John McEnroe and Tim Henman earlier today the podcast is now available by clicking on the 5 live Specials index.

Tim Henman
Former British number one on BBC TV

"Nineteen minutes that was. They went off at 19:14 and back on at 19:34, pretty good going."

The players are back on Centre Court and straight into the warm up.

Image source, Reuters

Madison Keys, who won the title at Eastbourne last week, beats Klara Koukalova 7-5 6-7 (3-7) 6-2 on court 12.