Chelsea are on red alert as Bruma pushes to be released from his contract at Sporting Lisbon.

Portuguese media sources say Bruma is to terminate his contract with the club.

He has been unable to reach an agreement over a new deal and there is also reported to be some dispute about the length of his current terms, with Bruma believing the contract expired in June and the club insisting he has a year left.

The highly-rated 18-year-old winger, who is thought to be a target for Chelsea and Porto, has now failed to show up for training with the Sporting academy this morning.