Chelsea are tracking Rosenborg striker Yssouf Kone.

"We have not received a concrete offer from Chelsea. But there is interest," Kone's agent Alfred Obrou told Adresseavisen.

Manchester City and Aston Villa have also been linked with Kone, though favourites are cashed-up Romanians CFR Cluj.

"I just got an offer from Romania, and the offer was really good. The challenges there are good. If Rosenborg let me go, I will go," Kone told TV2.