Frances Tiafoe shares heartwarming tribute to Juan Martin Del Potro

With the news that Juan Martin Del Potro may be retiring after his appearance at the Argentina Open, Frances Tiafoe joined thousands of fans and players in paying tribute to the Argentine.

After news of Del Potro's possible retirement broke, Tiafoe took to Instagram to pay tribute to the 2009 US Open champion.

"Man this is crazy. I really hope this ain't your last match. But if it is I want to say thank you. You were my favorite player growing up.

I remember watching you at the @citiopen as a kid. You were the first pro to ever sign a ball for me. After that I was a mega fan. I remember saying to my coach this guy is going to win the @usopen one day and you did it. I cried in 09 when you did.

I sound like a completely fanboy right now because I'm. What you went through in your career and still achieve what you did is remarkable. You are a Hall of Famer in my eyes. Living legend. I got nothing but love and respect for your man.

Walk with your head up forever man you left a big mark on this game. Give this man his love," wrote Tiafoe.

Del Potro lost his return match to compatriot Federico Delbonis at the Argentina Open this week, and has hinted that this may be his last match. The former World No.3 has battled with injuries over the last few years, and had not played a professional tennis match in close to two-and-a-half years.