Barcelona sent scouts to Portugal over the weekend to run the rule over Porto's star striker Jackson Martinez, according to reports in Spain.
The Colombian hit man has been in sensational form for the Portuguese champions over the last 18 months and has attracted interest from all over Europe.
One club thought to be hot on his heels in Chelsea, with Jose Mourinho reportedly ready to meet the £35m release clause in Martinez's contract.
Mourinho is currently struggling to choose from his current strikers at Stamford Bridge and wants to bolster his options by signing the 28-year-old, who has scored seven goals in six games in Portugal this season.
However, they aren't alone in their pursuit of the Colombian striker, as Spanish daily Sport claims that Barcelona sent scouts to Porto at the weekend as they look for a new frontman.
Gerardo Martino has already told officials at the Nou Camp that the squad needs reinforcements in January despite the fact that Barcelona are top of La Liga.
A centre-back is thought to be the priority for January and Chelsea's David Luiz has been linked with a switch to the Catalan outfit.
But with Lionel Messi struggling with injury, Martino is thought to be keen on bringing in striking reinforcements.
Sergio Ageuro of Manchester City is their top target but with the Argentinian in top form, the Citizens will need some convincing to allow him to leave so Martinez has seemingly been added to the shortlist should they meet an impasse with regards to Aguero.
Tottenham and Liverpool have also been credited with an interest in Porto's star striker.