FC Twente have dismissed Fulham's offer for Nacer Chadli and have warned it will take double the bid to tempt the club into selling the winger.
Fulham boss Martin Jol is eager to improve his attacking options and has also been checking on Chadli's team-mate Bryan Ruiz.
Reports in Holland have claimed that the Cottagers offered in the region of £4.3million for Chadli, who joined Twente last summer.
However, the Eredivisie club's chairman Joop Munsterman has rejected the bid and says it is only half of Twente's valuation.
Munsterman told Voetbal International: "It is a half offer and for that price we won't be letting him go."
Chadli is a full Belgium international, having made his debut earlier this year and he scored in both of Twente's UEFA Champions League games against Tottenham Hotspur last season.