Arsene Wenger has welcomed back Mesut Ozil and Laurent Koscielny from injury as the duo trained with the rest of his squad today.
Also included in the session at London Colney this morning were Mikel Arteta, who is a concern for tomorrow night's match with West Ham, and Tomas Rosicky who missed Saturday's FA Cup penalty shoot out win over Wigan.
Nicklas Bendtner returned from his spell nursing a hamstring injury and also on the training pitch was Abou Diaby, who is back after more than a year out with a knee injury.
Wenger was gloomy on the outlook for Tuesday night's Premier League game when he spoke to the media this morning prior to taking training.
"I cannot give you complete team news because many of them have to be checked today.
"We have plenty of uncertainties for muscular problems and fatigue.
"Who could be available who was not in the squad on Saturday?
"Maybe Rosicky and Koscielny - we'll have to test him definitely today.
"There are plenty of uncertainties so I have to make up my mind late on."
"The main uncertainties are Monreal who had to come off with a dead leg.
"Podolski had a little [muscle] problem but I think he will be alright.
"Then there is Oxlade-Chamberlain and Ramsey (both muscle tightness). They are the main problems."The Gunner need to win against Sam Allardyce's team to overtake Everton in the race for fourth place.