Nico Williams admits he cannot guarantee he'll be staying with Athletic Bilbao long-term.
The Spain attacker attracted attempts from Barcelona, PSG and Arsenal over the summer before committing to Athletic.
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Before defeat to Atletico Madrid yesterday, Williams told DAZN: "My heart is in Bilbao, but nobody knows what will happen in the future.
"It is always good when big clubs show interest. But I've always said I want to be here. If I heard anything, it was from my agent. But I wanted to play in Europe with Bilbao."
Williams is on a contract that runs through the summer of 2027.