John Isner nails a 146 mph ace at the US Men’s Clay Court Championship in Houston, which is said to be the fastest serve ever fired at the historic River Oaks Country Club.

Isner holds the record for the ATP's fastest official serve and third-fastest on record in tennis at 157.2 mph, hit during ...

Americans John Isner and Ryan Harrison will face off in the semifinals at the Hall of Fame Tennis Championships.

There's something special about Atlanta for John Isner, and the 6-foot-10 former University of Georgia star is something special in tiebreakers.