Adidas and the Chelsea football club have extended their sponsorship  deal for another eight years, locking the two organizations together until 2018.

The first deal was hatched in 2006.

“We are delighted to extend our partnership until 2018 after a highly successful first four years,” said Ron Gourlay CEO of the Chelsea Football Club. “Both organisations are highly ambitious and want to continue in partnership to develop globally and for us, grow in our key market territories across Asia and North America.”

The deal, which includes the rights to official merchandise and promotional opportunities, is reportedly worth close to £175m, over £20m a year for the football club.

“Both Adidas and Chelsea have a long and proud heritage in football and we're delighted to continue our working relationship with one of Europe's elite football clubs,” said Adidas CEO Herbert Hainer. “We look forward to many more years of success, working closely with the club on product, marketing and grass roots initiatives in the UK and around the globe.”

The Chelsea Football Club plays in the Premier League, and is based out of west London. The team won the Premier League title in 2010 in a season that saw an average home attendance of 41,423.