Jean-Philippe Gbamin could be unavailable for Everton until November after picking up a thigh injury.
The update comes as a blow for the Toffees, who forked out £25 million to bring the 23-year-old from Bundesliga club Mainz this summer.
Gbamin missed Everton’s 2-0 loss to Aston Villa on Friday and the club revealed that he suffered “significant injury to his right quadriceps muscle” in training.
The Ivory Coast international was brought to Merseyside to fill Idrissa Gueye’s void in the heart of the midfield following his permanent switch to PSG, and he has made two league appearances so far with 135 minutes of football played.