Superb defence from Murray forced a smash error and he held, which proved crucial because Gasquet immediately dropped serve
himself as his disintegration continued.
I have only dropped serve
once so far in three matches.
It was the first time Federer had dropped serve
all week and put Murray right back in the contest.
As quickly as it had sparked into life Del Potro's challenge withered in the decider after he dropped serve
in the second game to hand the momentum back to world number four Murray.
Del Potro took the first set on a tie-break 7-4 after neither player dropped serve
Henman, who reached the quarter-finals of this event last year, dropped serve
in the first game and Zabaleta was up 6-4 2-1, with a break, when rain stopped play for the day
The world No 5, who faces Moroccan Younes El Aynaoui, dropped serve
in the opening game and Vicente took the first set.
Hingis, who defends her Australian Open title in Melbourne later this month, said after the defeat in which she dropped serve
eight times: "It will push me to do better now.
The 32-year-old Williams continued to struggle and dropped serve
to trail 3-1 in the second set when Robson belted a forehand on to the baseline.
4 dropped serve
to trail 3-1 in the final set it looked like the end as a disgruntled Murray dropped his head.
But Rezai dropped serve
again and Petrova held her nerve to seal a 6-7(2-7) 6-4 10-8 win.
Russia's Vera Zvonareva dropped serve
in the second set but recovered to beat Flavia Pennetta 6-3 5-7 7-5.