Schwartzman thanks Djokovic: "Few people know what you do for this sport".

Just retired, Diego Schwartzman has unsurprisingly received numerous tributes and messages on social networks from other tour players, such as Novak Djokovic.

The Serb, on his Instagram account, posted these few words via a story: "My friend! Congratulations on an incredible career."

Schwartzman responded to this message, praising Djokovic, whom he played seven times on the ATP circuit (seven victories in favor of the former world No. 1):

"Thank you Nole! Few people know what you do for this sport, and that makes you even greater than your exploits on the court. It's been a pleasure to be able to see you up close all these years."