Everton boss Roberto Martinez will welcome back England World Cup trio Phil Jagielka, Leighton Baines and Ross Barkley for Leon Osman's testimonial on Sunday.
The Blues chief also expects to hand a first outing to new arrival Muhamed Besic, while Club-record signing Romelu Lukaku will be presented to the crowd.
Jagielka and Baines only returned to full training earlier this week following extended post-Brazil breaks.
Barkley, meanwhile, travelled to Bangkok for last Sunday's friendly against Leicester City but did not feature.
All three are now expected to play some part against FC Porto at Goodison Park, while goalkeeper Tim Howard will return early from his summer rest to take a seat in the stands.
"Ross Barkley and Mo Besic are now ready to be involved in a game situation," Martinez told evertontv. "Leighton Baines and Phil Jagielka, with the right measurement of minutes, are exactly the same.
"All in all, it will be a very good exercise for everyone in the squad.
"Tim wants to be here to be part of Leon's day, so he's coming back to be there but isn't going to be playing.
"It's a fantastic gesture and shows you the high regard that Leon is held in by the other players."
Another player who won't be in action against the 2004 European champions is Seamus Coleman.
The right-back suffered a hamstring injury during last week's 2-2 draw with Tranmere Rovers and will not be risked.
Luke Garbutt, who was withdrawn against Leicester due to a groin strain, should be fit enough to play.
Tickets for Sunday's game are still available. To buy, click here or call 0871 663 1878*.
Supporters planning to purchase their ticket on the day are advised to arrive at the stadium in plenty of time to avoid expected queues.