England forward Kane made it no secret that he wanted to leave the club last summer.
According to O Jogo, if Kane again demands a move and a club is successful in prizing him away from Spurs, the London club may look to Nunez from Benfica.
The 22-year-old is available, but only if Benfica receive an offer in the region of €80 million.
Other clubs have been linked to Nunez in recent weeks, including Spurs' local rivals Arsenal.
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