By London correspondent Tony Hughes

Tottenham have opened talks with Eric Dier over a new contract worth £19.5million, Football Insider sources understand.

Spurs approached the defender-turned-midfielder before Euro 2016 about tying him down to a new agreement.

A well-placed Tottenham source has told Football Insider that the club are now  in negotiations with the 22-year-old about improved terms.

The north Londoners have offered Dier a stunning £19.5million contract in a bid to secure one of their keyplayers to a long-term deal.

This is equivalent to £75,000-a-week and would run until 2021 if, as expected, an agreement can be reached.

The England international has four years remaining on his current £35,000-a-week deal, which he signed last September.

Dier had a fantastic 2015-16 season for club and country, proving his versatility and making the holding midfield role his own for both England and Spurs.

The 22-year-old was one of the only players to be considered a success from England’s dismal Euro 2016 campaign, as the Three Lions were knocked out by Iceland in the Round of 16.

Bayern Munich manager Carlo Ancelotti hailed him as one of the best players at the European Championships, after being linked with a move to bring in Dier as Xabi Alonso’s long-term replacement at the base of his new team’s midfield.

The former Sporting Lisbon man, who has also played at right-back and centre-back for Spurs, only just signed a five-year deal last summer a year after his transfer from Portugal.

Pochettino and chairman Daniel Levy have identified that they need to keep Dier, and are set to reward the Cheltenham-born utility man with a deal that will keep him in north London for another five years.

Elsewhere, Argentine manager Pochettino is set to confirm the signing of Marseille winger Georges N’Koudou for around £11million after he passed a medical.

In other Tottenham transfer news, the club hope to agree three new deals as a fourth is already in place.