Any club hoping to prise the veteran goalscorer away from the Basque Country for 2018 will have to stump up €40m due to a clause in his new contract

Experienced striker Aritz Aduriz has renewed his contract with Athletic for another year.

The 35-year-old’s deal at the San Mames was due to expire at the end of this season, but he will stay on for another campaign after a new agreement was announced by the club on Wednesday.

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The contract includes a clause that will force Athletic to accept a bid of €40 million for Aduriz.

Despite his advancing years, Aduriz enjoyed his most prolific campaign at the Basque side last term, scoring 36 goals in 55 appearances in all competitions.

Athletic Club and the player Aritz Aduriz have reached an agreement to prolong the player’s contract until 30 June 2018. pic.twitter.com/Bs02eiTCTn

— Athletic Club (@Athletic_en) December 21, 2016

He has continued that form this term, finding the back of the net on 12 occasions in his 20 outings to earn a place in Julen Lopetegui’s Spain squad for the previous round of qualifiers.

Aduriz came on as a substitute and scored in the 4-0 victory over Macedonia.