Jermain Defoe has been threatened by Portsmouth fans angered at the prospect of him leaving the club.
The England international has been strongly linked with a New Year return to former club Tottenham.
Manchester City and Serie A giants Juventus are also believed to have expressed an interest, with the 26-year-old seemingly destined to leave Fratton Park during the January transfer window.
Ex-Pompey boss Harry Redknapp, who is now in charge at Spurs, faced a similar level of abuse following his decision to take the reins at Southampton in 2004.
Defoe admits the whole episode has left a sour taste in his mouth and he has reported the issue to club officials.
"I have absolutely no idea how they got hold of my number but some of the calls have made me sick to my stomach," he told the Sunday Mirror.
"I have reported it to officials at the club, but cannot accept that it is coming from people with a balanced state of mind.
"It has infuriated and upset my family and left me wondering what on earth possesses people to do things like that."