Spurs were heavily linked to Van de Beek last summer, although it was Real Madrid who reportedly came closest to signing him.
At the time, Madrid were exploring other options in the market and there wasn't enough time to seal a deal for Van de Beek.
However, Mourinho's former employers are reportedly very keen and willing to splash the cash on the 22-year-old.
Madrid are willing to bid in the region of €55m for the Dutch midfielder's services, according to De Telegraaf.
It remains unclear whether Spurs will have much money to spend in January, and they're up against one of the richest clubs in world football.
His teammates Frenkie de Jong and Matthijs de Ligt sealed summer moves to Barcelona and Juventus respectively.
The player himself, however, is reported to be fully focussed on his football and isn't letting the gossip get in his head.
Van de Beek has scored seven goals and provided six assists in all competitions for Ajax so far this season.
