Aymeric Laporte has signed a new four-year contract with Athletic Bilbao that significantly increases his release clause.
The 22-year-old centre-back is now under contract with Athletic until June 2020, with his fresh deal including a buy-out fee of EUR65 million for the first two years of the deal, rising to EUR70m in 2018.
Laporte's previous deal had only been signed in June 2015 and was due to expire in 2019, with a release clause of EUR50m.
The new agreement should bring an end to reports linking the centre-back with Barcelona and Manchester City.
Laporte has been with Athletic's first-team since making his debut in November 2012, but has not featured since March after breaking his leg while playing for France Under-21s.
Laporte is yet to make a senior appearance for France and is also eligible to play for Spain.
Athletic finished the 2015-16 La Liga season in fifth position.