World Cup-winning France midfielder N'Golo Kante's planned move to Saudi side Al-Ittihad is being stalled by medical issues, a club source said on Thursday.
Kante, 32, has a history of injuries and missed six months of Chelsea's Premier League season with a hamstring problem.
The Al-Ittihad source said Kante had signed a binding agreement but the club were examining the results of medical tests before agreeing a final deal.
"Kante signed a binding agreement, not a final contract," the source said.
"We still review the medical checkup result. He has a long injury history and we want to be careful before signing a huge contract."