Chelsea £40m last summer but has struggled to settle in west London.
Bakayoko, however, didn't even make the bench for the Blues' Community Shield defeat to Manchester City last week as Fabregas, Barkley and Jorginho started in midfield.
Do you think the Croatian improves Chelsea's starting XI?
Centre-back Kurt Zouma joined Everton yesterday although the transfer window closed for English clubs on Tuesday at 5pm, while Michy Batshuayi will spend the season with Valencia.
AC Milan are expected to complete the loan deal for the Frenchman, in a bid to further bolster their squad options.
Chelsea winger Willian has confirmed he has no desire to leave the Blues this season after being linked with a move to Jose Mourinho's Manchester United.
"Next year I will try and change pre-season completely, if I can".
"I've always made it very clear that I've always been very happy playing for Chelsea".
Speaking after the game, he insisted that he is not looking to leave his current club while mentioning Barca's attempts to sign him.