Speaking to reporters, the Spanish coach said: "He felt something in his hamstring. He couldn’t continue. He will have to be assessed. Pretty worried about that one."
It's Saka's third hamstring injury of the season. Arteta added: "I’m not sure if it’s exactly the same one [that he did earlier this season]. It’s in the same leg. He had the third minor injury - I don’t know how big this is going to be. But he already had two.”