Il ventenne Auger-Aliassime è 19 anni più giovane del grande svizzero, chi ha vinto un record nel torneo di Halle 10 volte. Entrambi condividono lo stesso compleanno – Agosto. 8.
Federer had been going for his 18th quarterfinal in as many appearances at the grass-court tournament, but 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 ora, 45 minuti.
Auger-Aliassime next faces German Jan-Lennard Struff, who shocked top-seeded Russian Daniil Medvedev on Tuesday, or American qualifier Marcos Giron.
Also Wednesday, Andrey Rublev defeated Australia’s Jordan Thompson 6-4, 6-4 and veteran home favorite Philipp Kohlschreiber beat Corentin Moutet of France 6-4, 7-6 (4).