The meeting lasted 3 hours 31 minutes and ended with a score of 6: 3, 2: 6, 2: 6, 7: 6, 6: 3 in favor of the 38-year-old Swiss tennis player.
In the semifinals, Federer will play either with the current Australian Open winner Serb Novak Djokovic, or with Canadian Milos Raonic.
It was previously reported that Nadal got the better of Kiryos and reached the Australian Open quarterfinals.