Roger Federer defied age and logic once again to save seven match points before beating unseeded American Tennys Sandgren in a sensational Australian Open quarter-final. World number 100 Sandgren looked set to be the lowest ranked player to reach the Melbourne semi-finals since 1991. Only a fightback from 8-4 in the 10-point match tie-break against Australian John Millman stopped him falling in the third round. I was incredibly lucky," said Federer, who is the oldest man to reach the Australian Open semi-finals since Ken Rosewall in 1977. That was physically painful," said a sombre Sandgren, who recovered from the incident to win the next three points.

Source: BBC January 28, 2020 07:54 UTC