Arsenal's defensive stalwart William Saliba is set for a spell on the sidelines after Sunday's medical checks revealed a hamstring issue, ruling him out for a crucial fortnight. The Frenchman missed the recent draw with Aston Villa, and in his absence, Jurrien Timber stepped up to fill the void at centre-half.

Takehiro Tomiyasu has managed only six minutes of action this season following a knee injury and his return date remains unclear. Ben White underwent surgery on a knee problem back in November and Arteta has hinted he could return towards the end of January.

William Saliba missed Arsenal's dramatic draw with Aston Villa as Mikel Arteta sweated on his injury diagnosis with the defender due to be sidelined for several weeks

Mikel Arteta says William Saliba was ruled out of Arsenal’s Premier League fixture against Aston Villa due to a muscular injury. Saliba, 23, was missing from the matchday squad for Saturday’s 2-2 draw,

William Saliba will undergo tests on Sunday to determine the severity of his hamstring injury. The defender missed Arsenal ’s frustrating 2-2 draw with Aston Villa after he picked up the issue late in the midweek derby win over Tottenham.

William Saliba will be assessed today to determine the severity of his injury problem, with conflicting messages coming from Arsenal about the problem.Photo by Alex Pantling/Getty ImagesAhead of

Arsenal face a tough challenge in the Premier league when former manager, Unai Emery, and eighth place Aston Villa come to Emirates Stadium.

Premier League team news and line-ups as William Saliba ruled out - Mikel Arteta’s side look to keep up the pressure on league leaders Liverpool

Mikel Arteta has admitted he is "very worried" about William Saliba's injury after the Arsenal defender missed Saturday's 2-2 draw against Aston Villa on Saturday.

Arsenal's squandering of two Premier League points in Saturday's 2-2 draw with Aston Villa was compounded by concerns about an injury to defender William Saliba that ruled him out of the game. Saliba was not even in the squad after suffering a hamstring injury in the 2-1 victory over Tottenham Hotspur in midweek.

William Saliba is a concern for Arsenal’s match against Aston Villa on Saturday afternoon after an apparent absence from training and worrying images from the win over Tottenham Hotspur.Photo by