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A semi-final showdown between the two Swiss champions, Roger Federer and Stan Wawrinka, is locked in after results on day nine of the Australian Open.
Federer cruised past the unseeded Misha Zverev in straight sets (6-1 7-5 6-2).
A few days earlier Zverev had caused one of the biggest upsets of the tournament, defeating world number one Andy Murray.
But his strength was no match for the 17-time grand slam champion.
Federer says his performance was as good as it could have been.
Federer will face compatriot and world number three Stan Wawrinka.
Wawrinka had earlier beat France’s Jo-Wilfried Tsonga in straight sets (7-6 6-4 6-2).
Wawrinka, who is in his eighth Grand Slam semi-final, says Federer will be a tough opponent, but one he can beat.
In the women’s contests, Venus Williams guaranteed her spot in the semi-finals after defeating Russia’s Anastasia Pavlyuchenkova in straight sets (6-4 7-6).
Williams dropped serve against the Russian four times, but was the stronger player in the crucial moments of the match.
The 36-year-old American, who has never won the title, says she believes this Grand Slam could be her year.
Williams will now face the unseeded American Coco Vandeweghe, who also breezed past Spain’s Garbine Muguruza in straight sets (6-4 6-0).
It follows Vandeweghe’s straight-sets win over world number one Angelique Kerber.
Vandeweghe says Williams will be difficult to beat, but she’s up to the task.
Day 10 of the Australian Open will see the other quarter finals played, with Karolina Pliskova taking on Croatia’s Mirjana Lucic-Baroni and Johanna Konta facing Serena Williams.
In the men’s draw, David Goffin will play Grigor Dimitrov while Rafael Nadal will play Milos Raonic.