Roger Federer, Rafael Nadal, Carlos Alcaraz and Gael Monfils appeared in a video honoring the Argentine.
Del Potro defeated five-time defending champion Federer to win the 2009 US Open.
He also reached the final in New York in 2018, but lost to Djokovic.
Del Potro, a popular player with a huge forehand, won two Olympic medals – bronze in 2012 and silver four years later.
He won 22 ATP singles titles in his career and was ranked third in the world.
However, a wrist injury derailed his career after his US Open victory before he seriously injured his knee at Queen's in 2019.
Del Potro published a Video last week on Instagram, external He talks about the long-term injuries his body has suffered.
“My everyday life is not what I would like it to be. It's very hard. There are moments when I no longer have any strength,” he said.
“I am not indestructible. I have good things and bad things, but most of the time I have to fake it and put on a good face, but a lot of times I feel terrible.”
“Since that moment [after surgery in 2019]I could never climb stairs without pain.
“It hurts me when I drive, it often hurts when I fall asleep. It was a never-ending nightmare.”
