Celtic beat Partick Thistle 3-1 at Firhill on Saturday.
Doubts are beginning to arise over the Celtic future of manager Brendan Rodgers.
Celtic reportedly had bids rejected by Hibernian for McGinn, before Aston Villa landed the midfielder.
Boyata is currently in the last 12 months of his contract at Celtic.
West Ham United have signed Felipe Anderson and Andriy Yarmolenko in the summer transfer window.
West Ham United have signed Jack Wilshere among others so far this summer.
West Ham have been linked with a move for Celtic loanee Patrick Roberts.
Celtic loanee Christie is currently with Aberdeen.
Celtic legend Frank McAvennie trolls Glasgow Rangers after Graeme Murty's departure at Ibrox.
Graeme Murty’s Glasgow Rangers lost to Brendan Rodgers’s Celtic at Celtic Park on Sunday, as Liverpool legend Steven Gerrard has been linked with the Ibrox club.