Porto have vowed to lodge a complaint with UEFA after Manchester City supporters chanted "You're not incredible" at Hulk at Eastlands on Wednesday night.
City fans also labelled Hulk a "cheat" during City's 4-0 Europa League victory over Porto, which saw them through 6-1 on aggregate, and Porto communications director Rui Cerqueira feels the club should be punished.
He said: "We will take this to UEFA. It is improper behaviour. This behaviour may be normal in England but Porto want to contribute to eradicating it from sport."
UEFA said on Thursday morning that a complaint had yet to be lodged over the chants.
The move comes following the announcement that UEFA will charge Porto over alleged racial chanting against Mario Balotelli and Yaya Toure during the first leg of the tie at the Estadio do Dragao.
Cerqueira had said Porto were "surprised" when City made the complaint and claimed the supposed monkey chants were actually fans of both teams chanting "Hulk, Hulk, Hulk" and "Kun, Kun, Kun" in support of their players.