Stefanos Tsitsipas turned 23 on Thursday with a solid win into his fourth ATP Masters 1000 quarter-final of the season as he beat Olympic silver medalist Karen Khachanov 6-3, 6-2 in Toronto.

The Greek third seed set up a last-eight meeting with the form player of the moment, Norway's Casper Ruud, who extended his summer win streak to 13 matches.