What happened: Second-half clash with Jarrad Branthwaite at Hill Dickinson Stadium halted play for eight minutes before Martinez left on a stretcher. Chelsea confirmed successful surgery, with 21-year-old Mike Penders finishing Saturday's match for his Premier League debut.

Why it matters: Chelsea kept a clean sheet Saturday with Martinez in goal before the injury forced the change. Martinez joined this summer after six seasons at Aston Villa, while Penders, signed from Genk for £17m in 2024, now faces Tottenham and Manchester United in the league with a Carabao Cup tie at Liverpool in between.

What to watch: Penders is set for starts against Tottenham, Manchester United and at Liverpool in the cup. Martinez said he will return in a few weeks following the operation.