Porto's central defender Eliaquim Mangala could turn down Premier League champions Man City in favour of Chelsea this summer.
The French international is also a target for Man United and PSG, but appears to have his heart set on a move to London.
"City or Chelsea? Chelsea because it is London," Mangala told BeIn Sports.
"My goal now is the World Cup. We will see what happens after that. I told [agent] Jorge Mendes that I don't want to know anything about the transfer window until then."