Michael Essien's move to AC Milan could be in doubt after it was reported in Italy that he had failed his medical with the Italian club.
However the move is jeopardy after reports in Italy suggested that the AC Milan medical team had found a problem with his knee - which he seriously injured back in 2011.
According to La Repubblica, the Chelsea midfielder, who arrived at Milan airport on crutches, also failed other 'crucial tests' which could see the transfer collapse.
However the publication adds that AC Milan will further examine his physical well-being in order to see if there is a way to get the deal over the line.
The news is a blow to new Milan boss Clarence Seedorf, who had already welcomed the Chelsea ace to the club.
"I know Essien quite well," the 37-year-old told reporters. "I spoke with him clearly and transparently.
"We know him as a player and he's a very big positive for us. He'll be a big help. "I'm happy with Essien's arrival. He'll play in the middle - he can also operate as a full-back but I always like to see players in their best position. "Maybe it's a good thing [if he's had a sceptical welcome].
"If you look at the benches of Real Madrid and Chelsea, there are some great players who are maybe surplus to requirements. I have guarantees regarding Essien. He's a warrior with a lot of experience."
AC Milan are in the midst of a disastrous season, and currently sit in 11th place having been knocked out of the Coppa Italia by Udinese earlier this week - meaning they are likely to miss out on European football next season.
The Rossoneri have already allowed midfielder Antonio Nocerino join West Ham on loan - leaving them short in the middle of the park if Essien is unable to complete his move.
The 31-year-old has been with Chelsea for the last eight years but has become a peripheral figure in recent seasons, and spent last term on loan with Real Madrid.