Eric Dier to Tottenham: Latest Transfer Details, Reaction and More

Tottenham have confirmed the signing of Sporting Lisbon centre-back Eric Dier, according to the team's official Twitter feed:

The team confirmed the deal was officially done on Saturday:

The Cheltenham-born defender moved to Portugal as a 10-year-old and has been at Sporting since joining their famous academy—which has produced the likes of Cristiano Ronaldo and Luis Figo—signing a professional contract with the team in 2010.

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He will add depth to Mauricio Pochettino's central defensive options which currently include the likes of Younes Kaboul, Jan Vertonghen and injury-worry Michael Dawson.

Dier has some previous experience of playing with a Premier League side, having spent a loan spell at Everton from early 2011, although he made no first-team appearances.

He broke into Sporting's first team in the last couple of years with 30 appearances in the last two campaigns, the Lisbon outfit finishing second in the Primeira Liga in 2013-14.

As Portuguese football writer Jan Hagen points out, Dier has not become a regular for Sporting but has proved his worth for such a young man:

He is a versatile player who can also play very effectively as a deep-lying defensive midfielder and has represented England at U18, U19, U20 and U21 level.

While Dier will add versatility and depth to both Spurs' defensive and midfield options, it seems that Pochettino is not yet finished reinforcing his back line.

Rumours continue to circulate that the former Southampton boss is eager to tempt Jose Fonte away from his old club to north London, per Goal.com's Duncan Castles:

Though Dier is something of an unknown in England and has yet to play regularly at the very top level, Spurs look to have bagged themselves a young player with huge potential.

His experiences with the youth international teams will be helpful, and he will no doubt be very eager to make his mark in the land of his birth, having impressed so far in Portugal.