Arsenal manager Mikel Arteta has provided an injury update on midfielder Lucas Torreira after their FA Cup win over Portsmouth on Monday.
The Uruguay international was taken off the field on a stretcher in the first half of the game hosted at Fratton Park following a strong challenge from James Bolton.
Speaking to BT Sports after the game, Arteta said: "Lucas was very sore and is in a brace. He will be assessed in a few days and then we will know more.”
On the game, Arteta was impressed with his young guns with the Spanish singling out Reiss Nelson for special praise.
"I'm really pleased with them (the youngsters). I'm enjoying working with the players. They deserve a chance. It's always a risk but they're worth the risk.
"We have pace in a few players upfront. Reiss is a special player and can eliminate players one-on-one. He's been out for a while but he's back now and he showed what he's capable of doing," he added.
Sokratis Papastathopoulos and Eddie Nketiah were on target either side of half-time as Arsenal survived a sluggish opening 45 minutes to ultimately book a comfortable route to the quarter-finals.