Martin Odegaard was left with his knee in a brace and Declan Rice was forced off with a back injury as Arsenal's injury problems intensified during their 2-0 win over West Ham.
The Gunners went top of the Premier League thanks to Rice's opener and a Bukayo Saka penalty at the Emirates Stadium but the win came at a cost as Odegaard and Rice had to be withdrawn.
Odegaard, who had only recently returned from a shoulder problem, lasted just half an hour, becoming the first player in Premier League history to be substituted before half-time in three consecutive starts when he was replaced by Martin Zubimendi following a collision with Crysencio Summerville.
"He had a clash knee-to-knee and immediately he was uncomfortable," said Arteta in his press conference.
"I just spoke to him and he's