Roger Federer once again overcame long-time rival Tomas Berdych today to set up a semi-final against Next Gen champion Hyeon Chung at the Australian Open.

Defending champion Federer’s 7-6, 6-3, 6-4 win over Berdych extended his winning streak to 14 in Australian Open quarter-finals and to nine in that personal duel. The 19-time major winner leads that head-to-head contest 20-6, including all five meetings at Melbourne Park.

The 36-year-old Swiss star overcame a shaky start, dropping his opening service game and uncharacteristically challenging the chair umpire because of a technological fault.