Both Régis Le Bris and Mikel Arteta have some key team news concerns as Sunderland face Arsenal at the Stadium of Light on Saturday evening.
Here we bring you up to speed with all the team news from both camps as we have it...
Taken off at the interval in last week's win over Burnley with a muscle complaint. Has had more tests this week with Mikel Arteta admitting he is concerned about the issue. Appears unlikely at this stage to be involved this weekend.
1. Viktor Gyokeres - major doubt
Taken off at the interval in last week's win over Burnley with a muscle complaint. Has had more tests this week with Mikel Arteta admitting he is concerned about the issue. Appears unlikely at this stage to be involved this weekend. | Arsenal FC via Getty Images
Alderete has continued to experience some symptoms of concussion and so was still going through the protocols at the start of this week. Sunderland have to therefore manage him carefully.
2. Omar Alderete - doubt
Alderete has continued to experience some symptoms of concussion and so was still going through the protocols at the start of this week. Sunderland have to therefore manage him carefully. | Sunderland's Omar Alderete. Photo by Chris Fryatt.
Believed to be close to a return from an injury but having been left out of Brazil's squad for the upcoming internationals, isn't expected to be involved in this one.
3. Gabriel Martinelli - out
Believed to be close to a return from an injury but having been left out of Brazil's squad for the upcoming internationals, isn't expected to be involved in this one. | AFP via Getty Images
Close to returning from a knee injury but won't make this one. If Gyokeres is out then Arsenal will be without a recognised striker, though Mikel Merino has played there in the past and scored in midweek.
4. Kai Havertz - out
Close to returning from a knee injury but won't make this one. If Gyokeres is out then Arsenal will be without a recognised striker, though Mikel Merino has played there in the past and scored in midweek. Photo: David Price