Isaac Powell plays Tony in 'West Side Story.' (Photo by Jim Spellman/Getty Images)

The “West Side Story” revival has moved back its opening night date by two weeks after Isaac Powell suffered a knee injury during a recent performance.

The musical will now open on Feb. 20, instead of the previously announced date of Feb. 6. Powell, who plays lead Tony, is expected to be back in the show by opening, according to Deadline, which first reported the news Monday night.

A spokesperson for “West Side Story” confirmed the report.

Jordan Dobson, who is Powell’s standby, will play the role of Tony until Powell returns.

Produced by Scott Rudin, Barry Diller and David Geffen and directed by Ivo van Hove, the revival began previews at the Broadway Theatre on Dec. 10.