2020 Australian Open Men's Singles QF's - Roger Federer beat Tennys Sandgren to reach SF's

Roger Federer defied age and logic once again to save seven match points before beating unseeded American Tennys Sandgren in a sensational Australian Open QF's

The out-of-sorts Swiss fought off form and fitness concerns before winning 6-3 2-6 2-6 7-6 (10-8) 6-3.

World number 100 Sandgren looked set to be the lowest ranked player to reach the Melbourne semi-finals since 1991

But third seed Federer battled to win in three hours and 28 minutes.