Tommy's Top 25: Where do Arsenal rank?
Defender Squillaci and midfielder Diaby have recovered from respective hamstring and calf problems and will take their places in the squad. Squillaci's return in particularly is a boost for Arsene Wenger, with the Gunners' depth in central defence severely tested in his absence.
They could be joined by keeper Manuel Almunia, who has been out with elbow and ankle problems since the 3-2 defeat by West Brom last September. Winger Tomas Rosicky could also be back after being laid low by sickness while right-back Bacary Sagna may be ready to face Huddersfield after receiving a blow to the head against Ipswich on Tuesday night.
"Squillaci and Diaby will be in a squad,'' manager Wenger told Arsenal TV Online. "The only uncertainty I have is Rosicky. I don't know if he'll be fit or not. He was really sick. Almunia has a chance, Lukasz Fabianski no and with Thomas Vermaelen we need to be patient.
"Sagna is as good as he can be. Yesterday he was at home and he still had a little bit of a headache. All the examinations made at the hospital were clean. He should be available for Sunday. If not Sunday then on Tuesday (against Everton).''
Aaron Ramsey will not be part of Wenger's plans at the Emirates Stadium on Sunday having joined Cardiff City for a one-month spell on loan. The Wales midfielder hopes the move will provide the springboard for a swift return to the team having recovered from a broken leg.
"If going out on loan again for a month to get a few more games helps me get back into shape quicker and into the Arsenal team then I will do that,'' he told Arsenal's website. "I just want to get back to playing regularly and get back into the Arsenal team as quickly as I can.''