Chelsea have suffered a setback ahead of the new Premier League season, with Hakim Ziyech having to be substituted with what appeared to be a dislocated shoulder.
Ziyech had put Chelsea ahead against Villarreal in the UEFA Super Cup, but then suffered much frustration after he was caught by Juan Foyth.
After receiving lengthy treatment Ziyech eventually had to go off, with Christian Pulisic replacing him in the 43rd minute.
The news will be hugely frustrating for Chelsea boss Thomas Tuchel, especially after Ziyech enjoyed a productive pre-season.