During his second service game he became annoyed at fans shouting as he was about to serve.
Chela nicks the first two points of Murray's service game but Murray hits back with an ace.
At the end I was thinking maybe it could be my last service game of the year.
Federer got off to an electric start with a game to love before breaking Hewitt's opening service game.
But his first glaring error came in his second service game, when a low volley crashed into the net.
Arn led 4-0 and, despite losing momentum, still had a service game to take it to a decider at 5-3.
Youzhny made an edgy start, losing his first service game, and that proved decisive as Ivanisevic served out the set.
He enjoyed a good start Sunday and broke Nadal's first service game with a forehand winner before holding serve to love.
Murray breezed through his next service game and then broke his rival for a second time to secure the set 7-5.
Nadal raced through a love service game and immediately set about doing what he had failed to manage in the previous game.
She again dropped her opening service game in the second set but completed six breaks of the Schnyder serve to record her victory.
She threatened on Williams' next service game, but the 14-time grand slam champion won it to lead 4-1 before breaking Sharapova yet again.
Djokovic, the two-time defending champion in Melbourne, hadn't lost a set, or for that matter, a service game in his first three matches.
Davydenko then saved a set point before coming from 0-30 down in his next service game to take the set into a tie-break.
And Federer then took advantage of a poor Murray service game to break early in the third set and take charge of the match.
Murray, whose service game was impeccable, held to clinch the first set and both players held serve in the second for a nail-biting tie-break.
The crowd sighed, Federer's shoulders slumped and Murray looked almost embarrassed as he raced through his next service game to take a 4-1 lead.
BBC: Andy Murray beats Roger Federer to win Shanghai Masters
Robson was not done, however, and two searing forehand winners helped her break serve before she raced through a service game to level at 5-5.
She was able to relax and really attack the next Lertcheewakarn service game, breaking again before serving out the match on her second championship point.
Zheng won her opening service game before Henin swept the next 12 to continue her fairytale return in search of an eighth grand slam title.
With Soderling's unforced error-count rising sharply, Federer eased through another service game and, while not needing to find top gear, he was already oozing confidence.
But he made no mistake in Dodig's next service game, creating two more chances and taking the second with a drive volley behind his opponent.
The 19-year-old squandered a match point and was then broken for the first time in the match but made no mistake in his next service game.
Fourth seed Williams breezed through the opening set in just 37 minutes after losing her first service game, and showed no signs of rustiness after her lay-off.
More mistakes followed in Murray's next service game, culminating in a simple volley being sent agonisingly long to give Federer the double break and a 4-1 lead.
Murray seemed rejuvenated from his three-week break as his service game was almost flawless, with the British number one dropping just one point in the first set.
Djokovic enjoys an impressive record over Troicki, losing just once in their last 13 encounters, and broke his opponent's first service game to set the tone for the match.
The seventh seed faced the biggest service game of his life and he came through it confidently to win in one hour 23 minutes when Del Potro netted a forehand.
In the second set, Janowicz did well to hold his serve after five deuces but was broken to love in his next service game, giving Murray a vital 3-2 lead.
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