England captain Eoin Morgan admits he is a doubt to face Afghanistan after limping off against the West Indies with a back spasm.

Morgan left the field in the 41st over of West Indies’ innings, joining Jason Roy on the treatment table after he earlier hobbled off with a hamstring strain.

England did not require either of them, with Joe Root stepping into Roy’s shoes at the top of the order to strike his 16th ODI century – his 100 not out easing the hosts to an eight-wicket win, their third win at the ICC Men’s Cricket World Cup.

“It is sore. I have had back spasms before and it normally takes a few days to settle down. It is unclear, we will know more in the next 24 hours,” said Morgan.

“Jason had a tight hamstring and will go for a scan, it will be 48 hours until we know more. I think when any two players go down it is a bit of a worry but it is not panic stations yet.

“You normally get a good indication the following day. If it settles down then the improvement is there straight away.

“Like everybody, we have to see how it pulls up. We will see how risky it is and do a risk assessment going into that game, baring in mind we will have two games in a few days.”

England still head to Old Trafford next Tuesday brimming with confidence, after they swept aside the West Indies with minimal fuss.

Morgan won the toss and elected to field, pitting them against the dangerous Chris Gayle under cloudy skies.

The opener threatened a big score when he clubbed five fours and one six but the Hampshire Bowl outfield is a monster and he hooked Liam Plunkett into Jonny Bairstow’s hands while trying to clear the ropes.

Shimron Hetmyer and rising star Nicholas Pooran offered some resistance but Root accounted for them both with his part-time off-spin – demonstrating the strength in depth their possess.

“This is a very good example of that and another would be in Sydney against Australia last year when Liam Plunkett went down in the first over he bowled,” Morgan added.

“In the Champions Trophy against Bangladesh, Chris Woakes went down with a side strain. Strength in depth is something we have worked on in order to prepare for situations like this.”

The West Indies were all out for 212, with Jofra Archer (3/30) and Mark Wood (3/18) polishing off the tail and Morgan admits his 90mph bowlers make them stand out.

“It is one of the trends of the tournament we are fortunate we have three guys who touch 90mph,” he added.

“It is something we are going to use and it is a strength of ours but we also have a very good leg-spinner and off-spinner.

“Trends can change and later in the tournament the spinners might come into it.”