Griekspoor stuns Zverev with comeback win at National Bank Open

A tennis player named Tallon Griekspoor played against Alexander Zverev in Montreal, Canada.

Zverev is ranked number three in the world and was the top seed at the tournament.

Griekspoor is ranked number 69, so many people expected Zverev to win.

Griekspoor lost the first set in a tie-break.

But he did not give up and played much better in the second set.

He won the second set 6-2 and the third set 6-4.

He won the match and moved to the third round of the tournament.

It was his third time beating a top-five player in his career.

Griekspoor said it was one of the most special wins he has ever had.

He said his season had been tough and he nearly gave up, but he kept working hard.