A Top 9 portrait? An unintentional fashion faux pas? If you thought getting players into matching suits and snapping a photo was always a piece of cake, then you don't know tennis.

"I was No. 3 in the world, until suddenly, I broke my knees and here I am, with nothing," he said.

As the Swiss Maestro bids farewell to tennis, we revisit a four-part countdown of his most significant Grand Slam victories: up next, 2009 Roland Garros.

There wasn’t a dry eye in the house as the Argentine pulled off an emotional victory over the world No. 1, in what remains one of the biggest Olympic tennis upsets.

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.