Jonas Olsson vows to reward West Bromwich Albion

The Sweden international put pen to paper last night on a deal that could net him around £7m – potentially the most lucrative contract in Baggies history.

And the 29-year-old expressed his delight and insisted he will continue to improve as he heads into his 30s.

"I very much like where the club is going and the way we have progressed over the last few years," said Olsson, who has been with Albion since 2008.

"That made the decision, in the end, easy. I think every season I am progressing as well. At the moment I'm playing my very best football.

"Normally as a centre-half you have your best years in your early 30s.

"I'm determined to develop and hope to repay the trust the club has shown in me. It's been a long process but it's done now and I'm very happy.

"I had a few things that were important to me and there were some issues that were important to the club. Finally we came to an agreement – and I'm very happy."

Olsson's new deal ties him to Albion until the summer of 2016 and is expected to make him one of the Baggies' highest-paid players with wages in excess of £40,000 per week.

The deal is the latest coup for the Baggies, who completed the permanent signing of goalkeeper Ben Foster in the summer on a long-term deal and agreed a new four-year contract with midfielder James Morrison last month.

Head coach Steve Clarke said: "This is great news for the club and shows we're heading in the right direction.

"We've had a productive summer in terms of bringing new players in but it's equally important that you hold onto your best players, and Jonas certainly fits into that category.

"He's a tough, uncompromising central defender."

• Video from the Official Albion YouTube channel