Sánchez escaped injury as a Ferrari linked to him was badly damaged in a Nürburgring crash.
Chelsea must manage without João Pedro after Alonso said the forward will miss several weeks.
Chelsea are waiting on scan results after Emiliano Martínez was stretchered off with a head injury against Everton.
Chelsea await clarity on Reece James after a knee problem forced him out against Bournemouth.
Palestra and Emegha are back in Chelsea training, but major injury doubts remain ahead of Bournemouth.
Lavia’s Belgium exit looked worrying, but Chelsea learned it was only cramps, not a fresh injury.
João Pedro has explained why he ignored Arsenal and Barcelona to commit his future to Chelsea.
Chelsea's early defensive record under Xabi Alonso has joined an unwanted Premier League list.
