Roger Federer has overcome some incredible opponents in his time.
But on Monday afternoon in New York he finally met his match.
The Swiss legend took to the practice court in front of some adoring fans and, after a quick hit-out with his coach, played a rally with a young fan.
But what looked like a routine rally for the great man took a surprise turn when the youngster dished up a delicious lob to leave Federer stranded at the net.
Was it in? There was no hawk-eye on hand to say for sure, but we’ll let you be the judge…
The youngster’s shot was remarkable enough for anyone to play against Federer.
But it took on extra significance given the boy’s backstory.
Marc Krajekian was diagnosed with cancer at the age of eight and, as the life-threatening disease threatened to spread, had his leg amputated.
But Mark (now 10 years old) has beaten the illness and has adjusted remarkably quickly to life with a prosthetic limb, quickly getting back out on the court to continue his tennis obsession.
Roger Federer had sent the youngster a get well card to Mark in hospital, and on Tuesday that promise came true.
What a special moment!