Fed slices, he slices, Berd forced back, the space opening up - and Fed at the net to angle away a nerveless backhand volley.
The Russian rallied in the second and led 4-2 but Nalbandian quickly levelled and broke again before securing victory with a sharp backhand volley.
And here's a glorious chance for the 5ft 9ins right-hander to bring up break point... but he dumps a fairly straightforward backhand volley into the net.
Knifed drop-shot from Murray on the back-hand side, but that's great scrambling from Chela to keep the game alive, yanking a backhand volley past the flailing Scot.
Federer saved three set points with gutsy play, but on the fourth Roddick had only to put away a comfortable backhand volley, only to put it well wide.
After trading a couple more gentle shots, Sharapova sent a backhand volley wide and McIlroy quickly ran back to his seat before the world number two could get her inevitable revenge.
It had the effect of shaking Murray from his early morning slumber and the Scot hit back with successive breaks of his own, angling away a backhand volley for a 4-3 lead.
The first came when Tsonga attempted a backhand passing shot down the line, toward Djokovic's forehand volley, rather than crosscourt to the backhand.
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The 2003 US Open champion forced his opponent to put a backhand wide, an approach long and a volley wide to bring up two set points.
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He smiled when he let rip a top-spin backhand, and he even smiled when he netted a volley.
The most memorable moment came in the final set, when Goffin scrambled after several Federer shots, lofted a pretty backhand lob over Federer and then sneaked toward the net for a drop volley winner.
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The world number one set up match point with a serve-and-volley winner and then earned the victory when Lee hit a powerful backhand long.
His relatively smooth progress was jolted in the final set when he made a mad dash to retrieve a half-volley and hit the deck just after reaching the ball with a backhand, ending up sprawled on the rubberised hardcourt.
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