Groth hits 2nd fastest serve ever at Wimbledon Sam Groth has hit the second-fastest serve ever recorded at Wimbledon, a 147 mph (236 kph) winner against Roger Federer on Centre Court. 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. The 102nd-ranked German drew a loud ovation as he walked on to Court 3 for this third-round match, wearing bright red headphones.