Juan Martin del Potro also made an appearance at the star-studded Formula 1 event, which drew the likes of Michelle Obama, David Beckham and more.

Thoughts on the star-crossed superstar, who managed to accomplish so much in the face of endless injuries and historic competition.

Tennis fans may never agree on anything the way we agreed on the gentle giant, who brought emotion and theatre to the court, and a deep camaraderie to the tour.

The 33-year-old, oft-injured power player from Argentina won the US Open in 2009, but never reached those same heights again—though it wasn't for a lack of trying.

At one point, he was the only man other than the Big 3 to win a Grand Slam title in seven and a half years.

After a young boy returned a tennis ball to the 2009 US Open champ, he was rewarded with a memory to treasure.

Also in action during this jam-packed slate of tournaments includes Anett Kontaveit, Casper Ruud, Andrey Rublev, Anastasia Pavlyuchenkova and Taylor Fritz.

“It’s possible that this is more of a goodbye than a comeback,” the Argentine revealed in a press conference ahead of the Buenos Aires tournament.

The former US Open champion has accepted wild cards to play two clay-court tournaments in Buenos Aires and Rio de Janeiro.

The former US Open champion expressed a goal of returning to play his home tournament in 2022 after nearly three years off court due to injuries.