The latest from Wimbledon (all times local):

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1:55 p.m.

Sam Groth has hit the second-fastest serve ever recorded at Wimbledon, a 147 mph (236 kph) winner against Roger Federer on Centre Court.

Groth hit the serve at 1-1, 30-all in the first set against the seven-time champion. Federer got his racket to the ball, but couldn't return it.

It narrowly missed the Wimbledon record of 148 mph (238 kph) set by Taylor Dent against Novak Djokovic in 2010.

A clip of the serve can be seen here: http://clips.wimbledon.com/g/v/jaewuOdZFsL

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1:05 p.m.

Dustin Brown is struggling to replicate the kind of performance that saw him beat Rafael Nadal at Wimbledon, losing the first two sets in his third-round match against Viktor Troicki.

Brown's serve-and-volley game isn't working so far against the 22nd-seeded Serb, who has been hitting perfect passing shots on several key points to go up 6-4, 7-6 (3).

Troicki broke in the 10th game of the first set then erased an early break in the second.

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11:40 a.m.

Dustin Brown is back on court at Wimbledon, hoping to follow up his win over Rafael Nadal by beating 22nd-seeded Viktor Troicki of Serbia.

The 102nd-ranked German drew a loud ovation as he walked on to Court 3 for this third-round match, wearing bright red headphones.

Brown pulled off the biggest upset of the tournament so far when he beat Nadal on Centre Court in the second round on Thursday. It's the fourth year in a row that Nadal has lost to a player ranked 100th or lower at Wimbledon, but none of the three previous victors went on to win their next match.