Tottenham have offered defender Japhet Tanganga a new deal to prevent him quitting next year, Football Insider can reveal.

The Londoners are vulnerable to losing the centre-back, 20, as he is out of contract at the end of the season.

A Tottenham source has told Football Insider the club have tabled a contract offer to Tanganga after the green light from Mauricio Pochettino.

The Argentine is a big admirer of the rising star and regards him as a player capable of establishing himself in the first team.

Pochettino and his coaching staff believe Tanganga, 20, is one of the three outstanding youngsters at the club along with midfielder Oliver Skipp, 19, and centre-forward Troy Parrott, 17.

They are set to be given more prominent roles in the coming months, amid a startling decline in the performances of the senior stars.

Tanganga was handed his Tottenham debut in the League Cup defeat to third-tier Colchester United in September.

Like fellow debutant Parrott, the centre-back played 66 minutes of the match, which finished goalless in normal time before Spurs suffered a humiliating loss on penalties.

He was used in a three-man defence alongside Eric Dier and Davinson Sanchez, while Skipp was in midfield and Parrott spearheaded the attack.

Tanganga has not had any subsequent first-team action, but Spurs have high hopes for the youngster, who joined their academy at the age of 10.

In other Tottenham news, it can be REVEALED that Pochettino is planning to rebuild the Spurs defence around player who will cost ANOTHER £14million.