Speaking ahead of Wasps’ match against Toulouse at the Ricoh Arena, Director of Rugby Dai Young said:
“James is fine within himself, but he took a significant bang to the head on Sunday and we don’t feel it right to push him to meet the tight deadline for a six-day turnaround.
“We would obviously all like for James to be involved in our big game against Toulouse, James included, but the most important thing is for him to feel completely right and under no pressure to make the game this weekend.
“This is first time he has suffered concussion and we have told him to take extra time, with the aim of being fit for Zebre in the final pool round.”
Elsewhere, the injury updates on Joe Launchbury, Elliot Daly and Tommy Taylor are positive, with all three being in contention for selection this Saturday.