The Blues are expected to sign the Portugal attacker ahead of Premier League rivals Manchester United and Arsenal, with neither club ready to pay the €11 million (£9.69 million) loan fee.

Felix would provide head coach Graham Potter’s offensive options a much-needed boost, with his team scoring only 20 goals in 17 Premier League games this season.

Despite the fact that the transfer season has only been open for a little more than a week, Chelsea has already been busy in January, adding Benoit Badiashile, David Datro Fofana, and Andrey Santos.

Potter will be hoping that their signings can assist his team’s form, since they have only won one of their past seven matches in all competitions.

Chelsea are currently 10th in the Premier League – 10 points outside the top four – and have already been knocked out of the FA Cup and Carabao Cup