Auger-Aliassime into his 3rd semifinal of year after ill Medvedev retires from match

Canadian men's tennis player Felix Auger-Aliassime in action during his quarterfinal against Russia's Daniil Medvedev.

Canada's Félix Auger-Aliassime will face Andrey Rublev in the Qatar Open semifinals after he beat fellow Russian Daniil Medvedev when the latter retired after losing the first set 6-3 on Thursday in Doha.