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.
One of Mark Warburton's Glasgow Rangers men is delighted to be playing with the Ibrox legend.
Welcome to this morning's transfer round-up. This edition features 'Thibaut Courtois linked to Real Madrid again' and 'Huddersfield said very interested in Daniel Ward' plus more, so delve in below.
Johan Djourou has hailed former club Arsenal for the signing of Granit Xhaka.
David Pleat has been talking about Tottenham's transfer plans this summer.