Chelsea have signed a new multi-million pound sponsorship deal with Adidas.

The Mirror say the Blues have agreed a new 10-year kit deal renewal with current suppliers Adidas, worth a reported eye-watering £18 million-per-year.

Chelsea wouldn't reveal the exact figure involved, but did describe it as the club's 'biggest deal to date'.

"We are delighted to extend our partnership until 2023 after a highly successful first seven seasons," said Chief Executive Ron Gourlay.

"Both organisations share the same ethos and ambition and the new deal reaffirms adidas' belief in the club's status in world football."

Chelsea said in a statement on their official website: "This is the biggest deal to date Chelsea FC has signed with a partner and will see the sports brand continue to be the official sponsor and sportswear supplier for the club over the next 10 years.

"The partnership, which began in 2006, has continued to grow during a period of continued success for Chelsea.

"The Blues have won major honours both domestically and in Europe including being the first London club to win the UEFA Champions League. We have also won the Premier League, four FA Cups, the League Cup and last season, the UEFA Europa League."

If the deal is worth around £18 million-per-year then it would make them one of the highest earners from a shirt sponsorship deal in Europe.

Manchester United are believed to rake in around £23.5 million from Nike, while Liverpool are reported to make £25 million-per-season from their association with Warrior. 

Adidas recently caused a stir when launching Chelsea's official strips for 2013/14 with an eye-catching advertising campaign which featured various Chelsea stars completely covered in blue paint.

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