French Open champion Stanislas Wawrinka was knocked out of the Aegon Championships at the Queen’s Club by South African Kevin Anderson on Wednesday.

The Swiss player could not overcome the South African, who used an excellent serving game to overcome his distinguished opponent with two tie-breaks, 7-6(4) 7-6(11).

The 29-year-old South African talent is ranked 17th in the world, and produced 22 aces to oust the man who recently defeated world number one Novak Djokovic in the French Open final.

The victory sees him progress to the quarter-finals in London, and is a big boost for Anderson, as it comes on grass in the warm up tournament ahead of Wimbledon.

Speaking after the victory over Wawrinka, the South African addressed the fact that he has now beaten his Swiss opponent four consecutive times.

“That’s a funny coincidence,” Anderson told reporters, according to SuperSport. “I’ve just played these guys a lot of times, and I think it gives me confidence, knowing the guy I beat today just won the French Open and I watched him playing and beat the best players in the world doing it,” he said.

“A lot of things I have worked on came to fruition today,” he added.

Anderson’s run at the 2015 French Open came to an end in the third round of the competition against Frenchman Richard Gasquet, and having struggled on clay in recent years, he will be focused on improving his progress on grass, where he is usually more comfortable.