The agent of FC Twente winger Nacer Chadli has urged Tottenham to firm up their interest.

The Belgium international has been linked with Spurs in recent days.

Daniel Evrard told De Telegraaf: "We hear a lot about Tottenham, but the club will have to come up with a concrete offer first.

"So far only Swansea City and Shakhtar Donetsk have made offers and they are still options, even though Nacer initially decided not to go. We hope to have more clarity during this week."