Chelsea have confirmed that they will appeal against FIFA's decision to ban them from signing any new players until January 2011.
World football's governing body ruled that the Blues were guilty of inducing French teenager Gael Kakuta to breach his contract with Lens when they brought him to Stamford Bridge in 2007.
However, last season's FA Cup winners have reacted with incredulity to FIFA's decision, issuing a statement which read: "Chelsea will mount the strongest appeal possible following the decision of FIFA's Dispute Resolution Chamber (DRC) over Gael Kakuta.
"The sanctions are without precedent to this level and totally disproportionate to the alleged offence and the financial penalty imposed.
"We cannot comment further until we receive the full written rationale for this extraordinarily arbitrary decision."
DRC ruled that Kakuta, now 18, must also pay compensation of Euros 780,000 euros, for which Chelsea are also liable."
The teenager is still to make his first-team debut although he was an unused substitute in last season's Premier League win against Stoke City at Stamford Bridge.