UPDATE 1-Olympic-Tennis-Federer survives first round scare

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LONDON, July 28 (Reuters) - World number one Roger Federer

survived a scare in his opening Olympics singles match against

Colombia's Alejandro Falla before prevailing 6-3 5-7 6-3 on a

packed Wimbledon Centre Court to book his place in the second

round.

The 17-time grand slam winner and top seed, seeking his

first singles gold medal, had three match points in the second

set but then suddenly crumbled, hitting shot after shot into the

net.

The tense battle revived memories of the pair's first round

clash at Wimbledon in 2010, when Federer recovered from two sets

down to beat the gritty Colombian.

"I've struggled against him in the past at times," Federer

told reporters after the match.

"All of a sudden I missed the match points, things got

difficult and he played a great match to come back, so I'm

relieved of course. Falla is a great player, counter-punches

well, plays really well and made things really difficult for

me."

Returning to Centre Court less than three weeks after

winning his seventh Wimbledon title there, Federer made a solid

start, breaking his opponent to secure the first set 6-3.

The second set began in a similar vein, and at 5-3 Federer

looked on track to wrap up the win. But a string of errors saw

Falla seize the opportunity to fight back, saving three match

points and breaking the 30-year-old twice to take the set and

force a decider.

Normal service appeared to be resumed on the sun-drenched

court at the start of the third set, as the Swiss broke his

opponent in the opening game. But the world number 51 swiftly

broke back to level at 2-2.

Federer, who won doubles gold in Beijing with Stanislas

Wawrinka, broke again to go 4-3 up, then held serve to force

Falla to serve to stay in the match.

Buoyed by chants of "Let's go Roger, let's go", Federer

didn't let the chance slip away from him this time, looking

decidedly relieved to secure his victory.

In the next round, Federer will meet Julien Benneteau who he

narrowly beat in the third round of Wimbledon this year after

losing the first two sets to his French opponent.

(Reporting by Kylie MacLellan, editing by Justin Palmer)