Ollie Robinson appears unlikely to make England's XI for the final Test against West Indies in Grenada.
Robinson pulled up with a back spasm in England's only warm-up match at the start of the tour, just as he did in the final Test of the Ashes series in Hobart.
Robinson missed the First Test in Antigua, and was not risked for the Second in Barbados.
Now, having been one of just three players to train in Grenada on Tuesday, he has reported more soreness and appears unlikely to make the XI.
Captain Joe Root said Robinson had not come through the session as England hoped and would need to prove his fitness at their final training session today.
“Ollie wasn’t as good as we would have liked or he was expecting himself to be so we will have to make really sure on that today,” said Root.
“It’s just frustrating for him as it is for me. He’s working very hard but there’s something that’s nagging away at him and he’s just got to keep on doing what he’s doing and trust in time that he’s going to get himself back.
“We all know how effective he has been and how good he’s been in his short career up to now so the sooner we can get him back the better.”
Craig Overton is over the illness he suffered ahead of the Second Test and looks likely to come in for Matt Fisher. If Robinson is unfit, Chris Woakes could keep his place on a pitch that will have more grass.