When it comes to doubles teams, height is no barrier. John Isner, who is 6 ft 10 inches, will partner with Diego Schwartzman, who is only 5 ft 7 inches tall to play doubles at the Italian Open in Rome. 

The servebot-returnbot team will be fun to watch on the court. Diego Schwartzman has already had some friendly banters with another tall player, Reilly Opelka. Opelka once gave Schwartzman a servebot shirt. 

John Isner, who is 37 years old, has been playing a lot of doubles recently as his singles career slowly winds down. Isner and Hubert Herkacz teamed up to win the Miami Open title last month.

Despite his height, Diego Schwartzman was able to reach the Top 10 in the world. He has won 4 titles. He reached the semifinals at the 2020 French Open.