Nadal conqueror leaves tennis world speechless

An astonishing backhand winner from the young gun who defeated Rafael Nadal in Montreal has left the tennis world in awe.

Denis Shapovalov upset Nadal in a remarkable three-set victory in the third round of the Rogers Cup on Friday (AEST).

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The local boy lost the first set but returned serve to win 3-6 6-4 7-6 (7-4) in two hours and 45 minutes.

On Saturday, the 18-year-old was at it again in his quarter-final against Adrian Mannarino.

Shapovalov sealed his spot in the semi-finals of the tournament courtesy of a 2-6, 6-3, 6-4 victory over the Frenchman.

The Canadian's impressive victory was highlighted by an extraordinary piece of skill in the third set.

Up 30-0 but trailing Mannarino 4-3 in the deciding set, the young star was on the ropes as Mannarino sent him scrambling from one side of the court to the other.

Shapovalov's winner was simply extraordinary. Pic: Tennis TV/Getty

The Frenchman looked to have the point won with a cross-court backhand that landed in the corner of Shapovalov's baseline.

But the teenager somehow managed to reach the ball, twist his body around 360-degrees and return an unstoppable backhand winner.

Mannarino recognised the quality of the shot by giving Shapovalov a round of applause as the home crowd went wild for their newest hero.