Roy suffered a hamstring tear and Morgan a back spasm in the eight-wicket win over West Indies on Friday.

Roy, 28, will sit out the meeting with Afghanistan and Friday’s match against Sri Lanka, with England saying he will be assessed on an “ongoing basis”.

Morgan’s spasm has “settled down” and a decision will be made before the game.

Both injuries occurred in apparently innocuous circumstances at Southampton.

Morgan was moving to the non-striker’s stumps to back up a throw when he sustained the injury that left him struggling to climb the pavilion stairs.

He was unable to sit down when he spoke to the media after the game.

He had a scan and treatment over the weekend and England say he will be monitored before they meet the World Cup’s bottom side.

Roy left the field before Morgan, having pulled up when chasing the ball.

Earlier this year, he was out for seven weeks with a hamstring injury. He had an MRI scan in London on Saturday. It could be that the games against Afghanistan and Sri Lanka are all that he misses, or he could be ruled out for longer.