The San Antonio Spurs will be without their starting point guard to open the Western Conference Finals.

De’Aaron Fox will miss Game 1 against the Oklahoma City Thunder on Monday (Sportsnet 360, Sportsnet+, 8:30 p.m. ET / 5:30 p.m. PT) due to an ankle injury, per multiple reports.

Fox had yet to miss a playoff game for San Antonio this season, averaging 18.8 points, 3.5 rebounds, 5.8 assists and 1.1 steals across 11 appearances. not far off his regular-season averages of 18.6 points, 3.8 rebounds, 6.2 assists and 1.2 steals through 72 games en route to a second career all-star nod.

The news comes as a sudden shift after head coach Mitch Johnson previously said the all-star guard was expected to suit up.

Earlier on Monday, Fox indicated that his status would ultimately come down to how his ankle responds during an adjusted pre-game routine, adding that he was “just going through the day” to determine his availability.

Fox first suffered the injury in Game 4 of the West Semis vs. the Minnesota Timberwolves when Ayo Dosunmu landed on the Spurs guard’s right ankle while diving for a loose ball midway through the third quarter. Fox has been dealing with ankle soreness since then.

It’s unclear who will start Game 1 against OKC in place of Fox, but sophomore Stephon Castle and rookie Dylan Harper will likely take on the bulk of ball-handling duties in the veteran’s absence.