Diego Costa is currently La Liga's top scorer with 11 goals. He is also one of Europe's most exciting, most in-form strikers. Of course Chelsea want to sign him.
According to Mirror Football's John Cross, among others, Jose Mourinho is planning to sign the 25-year-old this winter.
The problem is, why would Costa want to leave Atletico Madrid in January?
After admitting that he came close to joining Liverpool over the summer, Costa told Mundo Deportivo, via ESPNFC.com:
I was close to leaving, Liverpool are a great team. But after fighting so hard and overcoming difficulties to get my place at Atletico, how could I leave? I thought that it was very important for me to continue growing in this club and to play here for many years.
He scored 20 goals for the club last season and is well on his way to eclipsing that figure this term. It looks like the Brazilian-born player is going to opt to play for Spain at next year's World Cup, and he'll need regular first-team football, no matter which nation he chooses.
The striker extended his current deal over the summer, tying him to the club until 2018. Perhaps Atletico will find it hard to resist big-money offers for their star man, who is said to have a £32 million release clause in his contract, via Jack Wilson of the Daily Star.
If it happened, it would be one of the hottest transfers of the year.