Torreira went off seriously injured like Deulofeu

With Deulofeu's injury, Watford had their head in their hands after finding out the Spaniard will miss the rest of the season. With this situation in memory, Arsenal fans saw how a similar thing happened to Torreira and he had to go off the field on a stretcher. 

At the beginning of the match, Bolton made a strong challenge. He touched the ball with one leg, but with the other one, he caught his opponent on the right ankle. The Uruguayan was clearly in pain. 

The midfielder stayed on the floor complaining about the injury. The medics had to come on and after checking that the player could not stand up. He had to be taken off on a stretcher. 

The consequences of this injury could be very serious. It looks very serious and until Arsenal reveal the full extent of the injury, there will be lots of speculation. Given what we saw, it looks like he could miss the rest of the campaign.