Felix Auger-Aliassime has at last won his first career ATP Tour title, dominating top seed Stefanos Tsitsipas to take the World Tennis Tournament crown in Rotterdam.

A 6-4 6-2 victory at the indoor tournament in his ninth final came as a huge relief for the 21-year-old Canadian, after he lost out in so many showdowns dating back to 2019.

“It has not been the smoothest road since my first final,” Auger-Aliassime said after Sunday’s win.

“It is an amazing day for me to get my first title and especially here.

“I played my first ATP main draw here a couple of years ago, so it is right I won my first title here.”

The third-seeded Auger-Aliassime hit seven aces and won 93 per cent of his first service points, compared to just one ace for Tsitsipas, who was denied an eighth title.

The Greek ace was unusually poor on serve, broken three times.

It was Auger-Aliassime’s third win in eight matches against Tsitsipas, and he did not face a break point in a superb performance.

“He was playing very good tennis, producing good shots and serving incredibly well throughout the match. I wasn’t able to respond,” Tsitsipas said.

“I wasn’t able to serve well today and my percentages were so low.”

Meanwhile, Reilly Opelka has sealed his third ATP Tour title by beating Jenson Brooksby in two tiebreakers in the all-American final at the inaugural Dallas Open.

The second-seeded Opelka won all 46 service games during the tournament and faced just one break point, which came in the second set of his 7-6 (7-5) 7-6 (7-4) victory over Brooksby.

The 6-foot-11 Opelka — the equal tallest player in ATP Tour history — powered 16 aces past Brooksby to make it 100 for the tournament.

In Buenos Aires, top seed Casper Ruud of Norway fought back from a set down to beat local favourite Diego Schwartzman 5-7 6-2 6-3 to secure the claycourt Argentina Open title for the second time.