Kevin Wimmer has been linked with a £6 million move to Southampton.
The Sun report Southampton are plotting a January transfer move for Kevin Wimmer, as a replacement for either Virgil van Dijk or Jose Fonte.
Wimmer is Tottenham's third choice centre-back behind Toby Alderweireld and Jan Vertonghen, and has proved his worth as a very capable back-up since signing in 2015.
Tottenham's Kevin Wimmer reacts
The Sun's report states Wimmer is rated at £6 million, £1.7m more than the fee Spurs paid Cologne for his services.
While that is a modest profit, it's nowhere near enough for a player who is a vital member of the first team squad, especially if they are stretched with Europa League football in 2017.
Wimmer has shown his quality at Spurs, with an excellent run late last season including a memorable performance in a 2-1 win over Manchester City at the Etihad.
Tottenham's Kevin Wimmer
The Austrian may well be frustrated at his back-up role, but has featured in big games and has played Champions League football at Spurs.
Tottenham only need look at Virgil van Dijk's soaring transfer value to consider that if Wimmer goes to Southampton, he could soon be worth two or three times the price they sell him for, with a chance to shine if he plays regularly.
Tottenham themselves will have to find another back-up, which will not be easy.
Teenager Cameron Carter-Vickers waits in the wings, and Eric Dier is an option, but at present really Spurs have the right numbers, and selling Wimmer would leave them one short.
Tottenham's Kevin Wimmer in action with Monaco's Valere Germain
Finding a player who would be content as a back-up option yet seamlessly slot in with the quality Wimmer has will not be easy, especially for a low price.
It makes far more sense for Tottenham to back their investment in Wimmer and make clear to him that he is at White Hart Lane for the long term.
Just like Gylfi Sigurdsson has at Swansea, Wimmer would likely become a big success given more freedom to succeed elsewhere.
Yet Spurs have to be selfis. They have a gem sitting on their bench with the potential to become a first team star if the opportunity arises. Letting him leave on the cheap makes little sense, from a football or financial perspective.
Gillingham's Cody McDonald in action with Tottenham's Kevin Wimmer