Tommy Haas, who turned 34 earlier this month, stunned the tennis world with a 6-2 6-4 victory over world number one Novak Djokovic at the Miami Masters with a truly inspired showing.
The 15th seed's victory was an upset, yes - by a big, big margin in tennis terms - but there was an incredible statistic behind the result that means it will be remembered for a long time to come.
The stat? No player Haas's age has beaten a world number one in 30 years.
It is rare that an upset occurs these days with the top four players in the world so utterly dominant.
The German veteran was ranked as high as number two in the world back in 2002, but no one saw his monumental performance in Miami coming.
Djokovic, a six-times Grand Slam champion, was left subdued as Haas pounded one-handed backhands into the corners and dictated the play with huge forehands.
"It's definitely the worst match I've played in a long time," Djokovic said afterwards, and the unseasonably cold weather no doubt favoured Haas - but still.
The German is now the feel-good story in tennis as he continues to defy his age and track record of long-term injuries. There could yet be another big title coming his way if he can consistently produce the performances he has in Florida.