Tottenham Hotspur have finally reached an agreement to sign Jan Paul van Hecke from Brighton, but one lesser-known detail of the deal could prove significant in the years ahead.It looks as though Tottenham’s hierarchy are following through on their promises of backing Roberto De Zerbi in the ongoing transfer window. The Lilywhites have shown little sign of slowing down in the market after already securing Andy Robertson and Marcos Senesi on free transfers. Now, multiple sources have confirmed that Spurs have also reached an agreement to sign Brighton defender Jan Paul van Hecke.The Dutch international has been one of Roberto De Zerbi’s priority targets for several weeks. Personal terms were agreed more than a week ago, and Tottenham had hoped to get the deal over the line before the Netherlands’ opening World Cup fixture. In the end, it took an extra two days of negotiations to get the deal over the line, but that wouldn’t disappoint anyone.Photo by Glyn KIRK / AFP via Getty ImagesBrighton secured one important condition before agreeing Jan Paul van Hecke saleNegotiations between the clubs were not always smooth. Tottenham had two bids, worth £40 million and £50 million respectively, knocked back by Brighton before finally reaching an agreement with a third offer of around £52 million. With just one year remaining on van Hecke’s contract, the Seagulls were no longer in a position to keep rejecting offers indefinitely.Brighton even tested Tottenham’s resolve with a surprise £30 million offer for teenage sensation Luka Vuskovic, a proposal Spurs immediately rejected.That is why many supporters were left wondering why Brighton would turn down £50 million only to accept a package worth just a little more.According to talkSPORT chief football correspondent Alex Crook, the answer lies elsewhere in the deal. The journalist claims Brighton successfully negotiated a 20 per cent sell-on clause as part of Van Hecke’s move to Tottenham. That means if Spurs eventually sell the defender in the future, Brighton will receive a sizeable percentage of the transfer fee.Understand #BHAFC have negotiated a 20 per cent sell-on in Jan Paul van Hecke's £52m move to #THFC.— Alex Crook ⚽️🎙 (@alex_crook) June 16, 2026What Jan Paul van Hecke’s arrival means for Tottenham’s other centre-backsWith Van Hecke’s arrival now awaiting only official confirmation, the move appears to bring further clarity to Tottenham’s defensive plans.Cristian Romero‘s departure has looked increasingly likely for some time and Van Hecke is expected to arrive as an immediate starter alongside Micky van de Ven. With Kevin Danso also in the squad, it is difficult to see where Romero fits into De Zerbi’s long-term plans, particularly with interest coming in from Manchester United.Luka Vuskovic remains a more complicated situation. Tottenham refused to include the Croatian in negotiations with Brighton and continue to view him as one of the club’s most valuable young assets. However, while Spurs are keen to extend his contract and potentially send him out on loan again, recent reports suggest the teenager would prefer a different solution.Meanwhile, Radu Dragusin’s future also appears uncertain. The Romanian has struggled to establish himself since arriving in January 2024 and interest from Serie A could provide an opportunity for all parties to move on this summer.READ MORE: How much Tottenham are actually willing to pay for Sandro Tonali amid £100m rumoursThe post Jan Paul van Hecke sell-on clause: Brighton really did get a great deal out of Tottenham appeared first on Spurs Web.