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The Sporting boss is thought to have emerged as Liverpool's top choice after Xabi Alonso ruled himself out of the running earlier this month.
Amorim has gained plenty of admirers during his time at Sporting and Porro is among the players to have benefitted from working under the 39-year-old.
Now at Tottenham, he believes Amorim shares a number of similarities with Ange Postecoglou and is convinced that he is destined for the very top.
Speaking about Amorim in an interview with Expresso, Porro said: "He is young, has a lot of ambition, a little bit like Ange Postecoglou here at Tottenham.
It is known and recognised how Sporting and Tottenham play.
They are seven points clear of Benfica with five games to go and will soon face Porto in the Taca de Portugal final.
The Sporting boss remains under contract until 2026 but refused to provide any assurances over his future when quizzed on Liverpool's interest earlier this month.
Sporting are dealing with their future and I can't decide now because I gave my word, I can't go back on that.
"If I don't win trophies, I'm going to leave Sporting.
I said that to my players and as the leader I can't go back on my word, as hard as that may be."
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