Anderlecht are willing to sell but their £10m price tag has yet to be met.
The Polish international has a contract until June 2020 having signed from Dinamo Kiev.
Spanish club Sevilla were first to make a bid but their interest is cooling after negotiations failed to reach a conclusion.
The La Liga giants have given Anderlecht an ultimatum to agree a deal by June 12 or they will walk away - and that could give Everton a chance to swoop.
Liverpool have also been linked with the player, having followed him for the last year.
Source: Mirror
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