FIFA has ordered Fiorentina striker Adrian Mutu to pay former club Chelsea £13.68m in damages for breach of contract after he tested positive for cocaine in 2004.
The English Premier League club signed the Romanian from Parma for £15m in 2003 but the following year he tested positive and was given a seven-month worldwide football ban.
Earlier in the year lawyer Cristian Sarbu said FIFA told Mutu to pay £9.6m but the fine was raised on appeal.
The 29-year-old's fine is the biggest ever handed down to a footballer and was calculated by FIFA's dispute resolution chamber according to the value of the remaining period on his Chelsea contract.
After being sacked by the London club and serving his ban, Mutu joined Juventus in January 2005, and at the end of the following season he moved to Fiorentina.
Chelsea expressed their delight at the ruling but Mutu is likely to appeal to the Court of Arbitration for Sport in Lausanne.
"Chelsea Football Club can confirm that it has received the decision from FIFA's Dispute Resolution Chamber (DRC) on the claim made against Adrian Mutu," a statement on the club's website read.
"Chelsea is delighted with the DRC's decision to award the club 13.68 million pounds in compensation.
"This is an important decision for football. Not only did the DRC make us a very significant monetary award, the decision also recognised the damaging effect incidents involving drugs has on football and the responsibilities we all have in this area.
"Chelsea will now be following the process laid out in the DRC's decision to claim the money from Mutu."