Former Barcelona striker Bojan is reportedly keen on a return to Spain, just three months after joining Premier League side Stoke City.
The 24-year-old, who started his career with Barcelona before moving on to Roma, only joined Stoke on a long-term deal this summer.
The forward has still not scored for his new club, however, with his appearances limited in the early part of the season.
According to Mundo Deportivo, which has credited reports in England, Bojan made his anger known after being left out of the Stoke team for their Premier League clash against Swansea last weekend.
It is believed that the Spaniard threw his boots across the room after learning he was not in the starting XI for the league fixture.
Real Sociedad and Deportivo la Coruna are both reportedly interested in a move.
