Eoin Morgan insists England are not at World Cup "panic stations" after injury scares for himself and Jason Roy.
Captain Morgan stood for his post-match press conference, so uncomfortable was the suspected back spasm that ruled him out of the majority of England's eight-wicket win over the West Indies.
Opening batsman Roy also hobbled out of the action with a hamstring complaint, leaving England facing a nervous wait over fitness updates on two key performers.
Joe Root's second century of the World Cup steered England easily to their 213 victory target, but Morgan admitted both he and Roy are injury doubts for Tuesday's Afghanistan clash at Old Trafford.
Asked about his own injury issue, Morgan said: "It's sore. I've had back spasms before and usually it only takes a few days to settle down.
"It's unclear at the moment, but we'll know more in the next 24 hours.
"This is in a different area (from previous back spasms). You normally get a good indication the following day."
On Roy's situation, Morgan continued: "He'll go for a scan tomorrow and it will be 48 hours before we have a result. When any two players go down it is a bit of a worry.
"But it's not panic stations or anything yet, we'll just see how we go in the next 48 hours and go from there."
Jofra Archer bagged 3-30 in a potent showing against his native West Indies.
Mark Wood took three wickets himself, with batting hero Root also claiming two key scalps with the ball as England cantered across the line for a third victory in four matches.
Root's knock took him top of the tournament's run-scoring charts with 279, beyond Bangladesh's Shakib-al-Hasan and Australia opener David Warner.
Archer came into this clash under significant scrutiny, given he had previously represented West Indies Under-19s.
But the fearsome pace bowler with an English father came through in style, leaving Morgan hugely impressed.
"The addition of Jofra covers all three areas, from opening the bowling to coming on in the middle and also death bowling too," said Morgan.
"So to have that at your disposal gives you a lot of options as a captain."
West Indies captain Jason Holder insisted he remained bullish about his side's chances of reaching the semi-finals, despite a second defeat in four matches.
"I think we'd be very foolish not to be confident of the semi-finals, still a hell of a lot of cricket left to be played," said Holder.
"We've just got to be disciplined and make sure we beat Bangladesh (on Monday)."