Australia's Nick Kyrgios stunned top seed Roger Federer 6-7 (2/7), 7-6 (7/5), 7-6 (14/12) on Wednesday to knock the Swiss star out of the Madrid Open.

Federer saved five match points before driving a forehand cross-court wide.

The 20-year-old Kyrgios won on his sixth match point while saving two Federer match-winning chances in their second round clash.