With majority shareholder Farhad Moshiri demanding answers after a summer of frustration at Goodison, who is to blame for Everton's missed opportunity.
The Sunderland forward picked up an injury in the 1-1 draw with Southampton.
Rangers manager Mark Warburton worked with Celtic boss Brendan Rodgers at Watford.
The former Tottenham Hotspur and Barcelona forward's late strike helped secure Bruce Arena's men a 2-1 home win over Columbus Crew SC.
The striker joined Sunderland on a free transfer earlier this week.
The goalkeeper joined Liverpool in the summer transfer window.
Mesut Ozil is under contract at Arsenal until the summer of 2018.
The Portuguese has not been at Old Trafford long, but is already making plans for next summer.
Arsenal take on Nottingham Forest in the League Cup later this month.
The 24-year-old has impressed for Liverpool so far.