Pep Guardiola has confirmed Kevin De Bruyne faces a "few months out" with a hamstring injury, with Manchester City now having to decide whether he will undergo surgery.
The 32-year-old midfielder was forced off in the first half of June's Champions League final triumph against Inter Milan and did not play a single minute of pre-season.
De Bruyne returned as a second-half substitute in the Community Shield shootout loss to Arsenal and captained the side against Burnley in Friday's Premier League opener.
"It's a serious injury," the City boss said in his press conference ahead of Wednesday's UEFA Super Cup game against Sevilla.

