Murray could not force a single break point against the top seed's service and Federer sealed the second set in 46 minutes with a sweeping forehand.
Federer faced 10 break points against the third seed as his serve let him down badly, his 55 per cent of first serves paling in comparison to Davydenko's 79 per cent.
Roared on by the crowd, Federer took the match into tiebreaker, but after a grueling 25 stroke rally the top seed gained the mini-break.
The Chilean seventh seed recovered from a break down in the second set to put an end to Ulihrach's run.
The top seed failed to earn a single break point in the match as he went out in one hour and seven minutes.
Henman was helped by a controversial over-rule from the umpire while facing break point at 4-4 in the opening set against ninth seed Lee.
Eighth seed Lopez edged the first-set tie-break before making the vital break in the ninth game of the second and served out for the match.
Federer seemed to catch a break in the draw when he was put in the same half as fourth-seed David Ferrer and not seven-time tournament winner Rafael Nadal, the third seed.
Second seed Nadal saved a remarkable four match points and was a break down in the third set, but overcame Almagro, who himself required treatment in the closing stages, to progress.
Though top seed Federer achieved his 39th successive win, he lost a tie-break for the first time in 16.
Williams secured an early break in the first game of the first set before Bartoli pegged her back but the number three seed closed out the opener 6-3.
And Argentina's 31st seed David Nalbandian , a former semi-finalist, was a break down in the final set before eventually prevailing 7-6 (7-4) 3-6 6-4 6-7 (6-8) 6-4 against South African Rik de Voest.
Matrix Partners India recently announced a new focus on funding a handful of seed-stage companies in the Internet and mobile sectors, and US venture capitalists are also looking to break in, including seed specialist 500 Startups.
Sixth seed Pliskova, 18, came back from 4-1 down in the tie-break to seal victory in one hour 20 minutes.
Federer went on to break immediately, but Murray hit right back and then took a 4-2 lead when he forced the top seed to go wide with a backhand.
The 20-year-old showed her grit to move past Russian seventh seed Safina after falling a break behind in every set.
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