Stan Wawrinka has sealed his place in the semi-finals of the Australian Open.
The defending champion beat Kei Nishikori in straight sets.
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He'll face either Novak Djokovic or big hitting Canadian Milos Raonic, who play this morning.
There will be an all-American last four match in the women's draw – but it won't be between the Williams sisters.
Although Serena beat Dominika Cibulkova, Venus was beaten by Madison Keys.
