Chelsea will reportedly have to come up with an offer of €30m (£27m) if they wish to sign Porto attacker Jesus Corona during this summer's transfer window.
The 27-year-old has been in impressive form for his Portuguese club during the 2019-20 campaign, scoring four times and contributing 17 assists in 44 appearances in all competitions.
A number of clubs, including Chelsea and Wolverhampton Wanderers, have been credited with an interest in the Mexico international, who largely operates as a right winger.
According to A Bola, Corona has a €30m (£27m) release clause in his current deal at the Estadio do Dragao and will not be allowed to leave unless the buy-out figure is met.
The report claims that Frank Lampard's side are interested in a summer deal, although a number of other teams are also said to be closely monitoring developments.
Corona has scored four times and registered 10 assists in 27 Liga NOS outings this term.
