Yerry Mina was close to joining Manchester United.
With Alderweireld's contract having a release clause in it from next season, Spurs are in a tough situation and will have to try and sell the Belgian star now or risk losing plenty of cash on the deal next summer.
Manchester United finished in second place in the Premier League table last season to secure their best finish since Sir Alex Ferguson's retirement.
However, the two clubs are said to be at odds over the fee, with Barca asking for €40 million for Mina, who they signed for just €11m from Palmeiras in January.
Barcelona have since signed Clement Lenglet from Sevilla in a move that plunges Mina further down the pecking order.
There is a belief among United staff though that a bid for the 25-year old should have gone in before his impressive World Cup campaign with England.
Meanwhile, journalist Duncan Castles says Valverde is at odds with Barcelona's board over Mina.
"So the solution was to put him out on loan for a year".
La Liga Champions Barcelona sealed the devices of Terry Mina a few months ago for just £11 m a few months ago but now, hope to net nearly four times that amount as the fee for the defender is expected to reach to the extent of £40 million.