Hulk has put Chelsea on alert by hinting that he would be keen to play alongside compatriot David Luiz at club level.
Chelsea are widely seen as favourites to sign the Porto striker this summer, but it is believed they have been unwilling to meet their valuation.
Hulk has a €100million buy-out clause in his contract at the Estadio do Dragao and it is thought Porto are unwilling to let him leave the club for less than €40m.
The 25-year-old, who has also been linked with Paris Saint-Germain, has admitted in recent interviews that he is ready to leave Portugal this summer should the right offer come his way.
And he will have alerted Chelsea boss Roberto Di Matteo by praising Blues defender Luiz.
"I am playful and get along well with everyone," Hulk told Globoesporte.
"But my companion was David Luiz at Sao Paulo and Vitoria early in my career. He is a great friend and today is a pleasure to play alongside him."
Of his future, he added: "I'm not desperate to leave Porto. "I love the Portuguese fans and have always been right with the club.
"But, if a club to reach an agreement with Porto, I will leave."
Porto president Pinto da Costa last week insisted he is yet to receive any firm offers for his prize asset.