The 21-year-old Colombian had emerged as one of the world’s most promising centre-back talents in 2016/17 as an Ajax side with wonderkids in every position stunned the continent to reach the final of the Europa League.
And since moving to Spurs, Sanchez has shown why he is so highly-rated. The number four might have endured a few nervy moments against Liverpool and Juventus but, for the most part, he has looked the epitome of the complete, modern-day defender.
One year on, however, will Tottenham break their transfer record once again to sign another 21-year-old centre-back?
Well, it depends how much Ligue 1 strugglers Toulouse will demand for their highly-rated skipper Issa Diop.
As reported by Mundo Deportivo, Spurs are among a number of huge European clubs, including Real Madrid, Barcelona and North London rivals Arsenal, who have sent scouts to watch Diop in action in recent months.
And they will not have been disappointed. Even when putting through his own net in Saturday’s 1-0 defeat to PSG, the France U21 ace was excellent throughout and limited the world’s most expensive player Neymar to spectator status.
Interestingly, however, the now departed Toulouse coach Pascal Dupraz told RMC in the summer of 2017 that clubs would have to make an offer they can’t refuse in order to snatch Diop – possibly somewhere in the region of £44 million.
You don’t need us to tell you that this is more than Spurs invested in Sanchez.
Real Madrid and Barcelona won’t have any qualms about paying a huge fee, however, meaning Tottenham may be forced to offer top dollar to stay in the race.