HALLE, Germany -- Roger Federer failed to reach the Halle Open quarterfinals for the first time Wednesday when Felix Auger-Aliassime rallied from a set down to stun the former champion 4-6, 6-3, 6-2 in the second round.
The 20-year-old Auger-Aliassime is 19 years younger than the Swiss great, who has won the Halle tournament a record 10 times. Both share the same birthday: Aug. 8.
Federer had been going for his 18th quarterfinal in as many appearances at the grass-court tournament, but he was unable to deal with his young opponent's change of tactics in the second set. Auger-Aliassime targeted the backhand with his strong serves and the Canadian player converted three break opportunities to win in 1 hour, 45 minutes.
Struff had shocked top-seeded Russian Daniil Medvedev on Tuesday.