Romelu Lukaku netted his 14th goal of the season for Everton against Crystal Palace on Monday night.
Newcastle United will be looking to build on the win against Liverpool with victory over Tottenham Hotspur on Sunday.
Liverpool and FC Sion go head-to-head later this week.
Arsenal star Calum Chambers could feature in midfield against Olympiakos.
Javier Mascherano signed for West Ham in 2006, and played just five games.
The Belgian has been in fine form for the Blues so far this season.
Tottenham Hotspur and AS Monaco clash later this week.
Leeds United defeated Hull City 2-1 at Elland Road in the Championship on Saturday afternoon.
Celtic manager Ronny Deila has failed to guide his side to European success in two seasons.
Queens Park Rangers are set to host Burnley on Saturday.
A young Manchester United midfielder could be the perfect short-term addition to Leeds United's squad.
Taking a closer look at the Manchester United and Arsenal play-makers' performances at the weekend.
The former Real Madrid star and ex-Aston Villa loanee were among the star performers in week 11 of MLS action.