DOHA — Montreal’s Felix Auger-Aliassime advanced to the semifinals of the Qatar Open tennis tournament after Russia’s Daniil Medvedev retired from their quarterfinal with an illness. Auger-Aliassime won the first set of Thursday’s match 6-3 before Medvedev, who was seeded fourth at the ATP 500 tournament, left the court. The 24-year-old Canadian won 89 per […]