Wayne Rooney will be examined by independent medical experts on Thursday before Sven-Goran Eriksson makes a final decision about the striker's participation in England's World Cup clash against Trinidad & Tobago.
Eriksson is keen for the 20-year-old to play some part as England look to book their place in the last 16, after claiming the Manchester United star is now match fit after recovering from a fractured metatarsal.
However, the Football Association is keen to avoid a dispute with United about Rooney's fitness and will take advice from specialists Professor Angus Wallace and Professor Chris Moran from the Queen's Medical Centre in Nottingham before giving him the green light to play.
Wallace told BBC Sport: "I am going to speak with England. There will be a report on Thursday afternoon and maybe an announcement afterwards."
Whatever the specialists' advice, Rooney is unlikely to start against the Soca Warriors.
"For me, Rooney is match fit but let me sleep on it. I will decide tomorrow morning," Eriksson said on Wednesday.
"Almost for sure he is not starting the match, I don't think he has 90 minutes in him yet."
Rooney has not played since suffering the injury during a Premiership match against Chelsea on April 29, but has performed well in training since England arrived in Germany.