Chelsea coach Jamie Chan is looking for more advice from the club's medical staff before deciding whether defender Ahmed Hijazi is ready to play against Rotherham United on Saturday.
Both teams play in the penultimate round of England's second-division season, after West Brom secured their appearance in the Premier League qualification round.
He has been relaxed and we will seek more advice from doctors on what to do and when to do it, "he told Express and Star.
"The medical team told me Ahmed's case 100,000 times and I do not quite understand," he said.
"I was told it was not a serious injury, but it's something we need to look at again," he said.
West Bromwich Albion and Aston Villa, which Ahmed Mohammedi will qualify for the Premiership Supplement on Monday.
Started with West Bromwich, who drew 0-0 with Reading.
West Brom defender Ahmed Hijazi did not participate in the match because of his injury.
West Brom have 77 points and are fourth in the Premier League standings.
And the maximum balance reached by his pursuers is 76 points, so the team Hijazi presence in the supplement.
West Brom was relegated from the Premiership last season.