James Anderson will undergo a scan to discover the extent of his calf injury after he left the field early in the opening morning of the Ashes Test at Edgbaston.
Anderson, England's leading wicket-taker in Test cricket, pulled out of bowling due to discomfort putting his future participation in the remainder of the match in doubt.
Despite not being fully fit, the England management gambled on Anderson's inclusion in the playing XI in the absence of Jofra Archer's services, who himself is recovering from a side strain copped during the World Cup.
Anderson could manage to bowl only four overs before he was forced out of the cricket action, though he did return to the field later but did not take the ball.
If the veteran pacer's calf tear has indeed resurfaced, Anderson could possibly not feature in the next two or three Tests.
The risky induction of Anderson into the team is bound to raise question marks on the logic of the selectors to persist with the right-arm paceman.
The Lancashire star, nevertheless, bowled without any soreness in the training session, which was beset by poor weather conditions, ahead of the game.
England also boast the likes of Sam Curran and Olly Stone among their reserve pacers while Mark Wood is out of the line-up for a lengthy period of time.
The burden of overs in the ongoing game at Edgbaston will thus be shared between the three pacers - Stuart Broad, Ben Stokes and Chris Woakes - and the lone spinner in the side Moeen Ali.