Ivo Karlovic
- Date of birth: February 28, 1979
- Birthplace: Zagreb, Croatia
- Residence: Zagreb, Croatia
- Height: 6'10" (2.08 m)
- Weight: 230 lbs (105 kg)
- Plays: Right-handed
Ivo Karlovic has won four ATP singles titles: three in 2007 and one in 2008. He has also defeated several highly ranked opponents including Roger Federer who was ranked No. 1 at the time.
His primary strategy is serve-and-volley, and he is considered one of the best servers on tour. His height (6 ft 10 in) enables him to consistently serve with high speed and unique trajectory.
Karlovic caused a stunning upset at 2003 Wimbledon Championships when he beat defending champion Lleyton Hewitt in his first-ever match in a Grand Slam tournament. He finished the 2003 year in the Top 100 and as the No. 3 Croatian, behind Ivan Ljubicic and Mario Ancic. He also averaged an ATP best of 17.6 aces per match.
