The agent of Vitesse Arnhem striker Wilfried Bony admits he will be sold in the summer.

Chelsea have joined West Ham United and Stoke City in their interest in the Ivorian.

Agent Dalibor Lacina revealed: "We have negotiated his departure with Vitesse and there must be a transfer in the summer. It is a sensitive subject.

"Vitesse has asked me not to comment on the issue."