5: Novak's 'greatest' win

At the age of 37, Novak Djokovic finally won an Olympic gold medal to go along with his 24 Grand Slam titles, describing the moment as his "greatest ever achievement".

The Serb defeated Carlos Alcaraz, 16 years his junior, in a memorable final at Roland Garros where he has already been crowned French Open champion three times.

Djokovic achieved his dream the hard way — having to defeat career-long rival Rafael Nadal in the second round in the pair's 60th, and what proved to be their final, meeting.

He then overcame aggravating a knee injury, which had needed surgery in June, during his quarterfinal win over Stefanos Tsitsipas.