Phoenix Suns backup point guard Brandon Knight suffered a torn ACL in left knee last week and is expected to miss the entire 2017-18 season, the team announced.
He will undergo surgery and an official timetable for his return will be determined at a later date, the team said.
Knight was injured during a pro-am game last Wednesday in Miami.
Knight, 25, played in 54 games (five starts) last season and averaged 11.0 points and 2.4 assists in 21.1 minutes per game.
Phoenix acquired Knight in a three-team deal with Milwaukee and Philadelphia at the 2015 deadline in exchange for a lightly-protected Los Angeles Lakers first-round pick that has become one of the most valuable trade assets in the league.