Tennis fans may have not heard of Malek Jaziri yet. He has never made it to the second week of a Grand Slam and he's ranked a modest No. 61.

But in the round of 16 at the China Open, the 34-year-old Tunisian pulled off arguably the greatest win of his career. He defeated world No. 4 Alexander Zverev in three sets 7-6 (4), 2-6, 6-4. Not only was this one of the greatest upsets for Jaziri, but it also featured a highlight-reel point.

Jaziri slipped in a tweener winner while down in the second set, earning a high five from Zverev at the net. This marks Jaziri's third victory over a Top 5 opponent this season, the other two coming against Marin Cilic and Grigor Dimitrov.