Ireland head coach Joe Schmidt has revealed that Joey Carbery suffered an ankle sprain in their World Cup warm-up win over Italy, but they will have to wait to discover the extent of his injury.

The 29-10 victory was overshadowed by Carbery's withdrawal in the second half, with the out-half making way on a cart after shipping an ankle knock in a ruck.

It was a worrying sight with the Rugby World Cup on the horizon, and while Schmidt confirmed that the Munster star did not sustain a fracture, Ireland still have to wait for further clarity on his injury.

"He has an ankle sprain," he told RTÉ Sport after the game at the Aviva Stadium.

"There's no fracture and that's a promising first sign. We're going to have to wait probably 48 hours to see whether he needs a scan, and if he does, we need to let the swelling go down.

"The swelling's not too bad so finger's crossed at this stage."

Schmidt continued:

"We don't really know the timeline until we know the injury but it looks like a ligament injury in the ankle. The ankle looks pretty stable so we'd be hopeful that it's not going to be too bad."

Remarking on Ireland's overall performance, Schmidt seemed pleased with his side's overall effort. Carbery, Dave Kearney and man-of-the-match Andrew Conway were among the try-scorers in Ireland's 19-point victory.

They conceded two tries to Conor O'Shea's Italy charges, but Schmidt elected to focus on the positives from the display. 

"I think everyone worked hard," he said.

"The guys making their debut. Jean Kleyn and Mike [Haley] did well fitting in. Jean had a really good workrate for us, Andrew Porter had a good first half at tight-head and then started to tire a bit as loose-head later on.

"Andrew Conway did really well for us. He got the ball back for us when we're looking to get away from those kick-offs. Dave Kearney did well.

"Joey had a really good first half, I thought he controlled the game really well - put the ball where we needed it to go, played when we needed to play and played in behind them when we needed to do that."