SHANGHAI — Canadian Felix Auger-Aliassime is out of the Shanghai Masters after suffering a knee injury.
The fifth-ranked Montrealer was forced to retire from his fourth-round match against Norway’s Casper Ruud. Auger-Aliassime trailed 5-2 in the opening set before retiring after just 35 minutes.
He appeared to injure his knee early in the match and received treatment before deciding he couldn’t continue.
Ruud advances to the quarterfinals, where he’ll face Spain’s Rafael Jodar.
Jodar advanced with a 6-7 (7), 6-4, 6-2 victory over Dutchman Botic van de Zandschulp.