The Croatia striker has also been linked with clubs such as Aston Villa and Besiktas.
Shakhtar Donetsk are leading the chase for the 27-year-old as they can offer Champions League football and are ready to pay the striker £50,000-a-week, according to the Daily Mail.
The Ukrainian side are looking to strengthen for the Champions League and have also been linked with players such as Luis Suarez and Oscar Cardozo.
