Even though the Switzerland captain said he is happy at Signal Iduna, Frei revealed that he has a number of other offers worth considering.

"I'm quite happy at Dortmund. The fans are happy with me, but the problem is that I’m not considered a starter by the coach," the 29-year-old told the French press.

"I have been approached by Napoli, PSG and Tottenham."

Frei notched nine Bundesliga goals so far this term, which makes him top scorer for Jurgen Klopp's team.

The former Monaco striker admitted earlier that he is having problems getting along with Klopp on personal terms.

Frei is often facing competition for his place from Egypt forward Mohamed Zidan and Paraguay's Nelson Valdez.