Canada's Pospisil through to semis in Montreal after Davydenko retires

Nikolay Davydenko retired in the first set, sending Vasek Pospisil through to the semifinals at the Rogers Cup on Friday.

Pospisil had a 3-0 lead when his opponent informed the chair umpire he could not continue. Pospisil will next play the winner of the afternoon quarter-final between Canadian Milos Raonic Latvian Ernests Gulbis.

After the match, Davydenko said he has bronchitis. The Russian has been ranked as high as No. 3 in the world but currently holds the No. 47 position.

Pospisil, a wild-card entry, upset American John Isner in the opening round and then topped Czech veteran Radek Stepanek. The 71st-ranked Pospisil followed that up with a stunner on Thursday when he knocked off fifth-seeded Tomas Berdych of the Czech Republic. It was the Canadian's first win over a top-10 player.