The towering frontman has seen a move to the Premier League mooted, and he is keeping all options open in the summer window
Stuttgart striker Sasa Kalajdzic is on Chelsea's recruitment radar, and the towering 24-year-old is ruling nothing out in the summer transfer window.
The highly-rated frontman, who stands at 6ft 7, hit 17 goals at club level last season before heading away with Austria on Euro 2020 duty.
Thomas Tuchel is said to see him as a cheaper alternative to current domestic rivals Erling Haaland of Borussia Dortmund and Bayern Munich superstar Robert Lewandowski.