Speaking exclusively to Football FanCast, former Arsenal striker turned pundit John Hartson believes that Tottenham Hotspur will be actively looking for new centre-backs.

As things stand, Spurs will lose out-of-contract duo Toby Alderweireld and Jan Vertonghen when they contracts expire in the summer, and potentially even in January if they are offered an acceptable fee by another club.

While there hasn't really been a recent update on the situation with Alderweireld, The Daily Mail reports that the club is in talks with Vertonghen over an extension, although they are apprehensive about offering him more than just a further 12 months because he is 32 years of age.

It remains to be seen whether any compromise can be reached in that regard with the same report saying the Belgium international will use the fact that the 30-year-old Moussa Sissoko was handed a new four-year contract last week as a bargaining tool during discussions.

With Davinson Sanchez and Juan Foyth yet to really show consistently that they can be starting XI regulars for Tottenham, Hartson wouldn't be surprised if the club's scouts are hard at work right now given the situation with the Belgian duo.

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The Welshman said: "They'll have to be proactive in the market because there will become a time in January when they can talk to clubs and leave on a free at the end of the season.

"They will be constantly looking for centre halves now with them two looking like they'll let their contracts run down."

Hartson is completely right, and it is looking more and more likely that a more serious rebuild is needed at Tottenham in 2020 given recent results and performances - Pochettino has even suggested as much himself.