1. Marin Čilić
Marin Čilić's height of 1.98 m (6 ft 6 in) enables him to come up with powerful ground-strokes and fast serves. He has won 18 ATP Tour singles titles, including the 2014 US Open.
2. Ivo Karlović
Ivo Karlović is currently the joint tallest ranked tennis player. Thanks to his height of 2.11 m (6 ft 11 in), he holds the record for the most number of aces served. He also held the record for the fastest serve, measured at 251 km/h (156 mph).
3. Kevin Anderson
Standing at a height of 2.03 m (6 ft 8 in), this South African giant became the tallest finalist in the history of Grand Slam when he reached the 2017 US Open final. He repeated this feat when he reached the 2018 Wimbledon final.