Mauricio Pochettino brought in the likes of Victor Wanyama, Vincent Janssen, Georges-Kevin Nkoudou and Moussa Sissoko and Pau Lopez on a season-long loan deal, but Ferdinand believes that Wanyama is the only worthy purchase.
"The club spent £68million on Victor Wanyama, Moussa Sissoko, Vincent Janssen and Georges-Kevin N’Koudou. It is still early in their careers at Spurs and they obviously have talent. But if I was at a rival club, none of those buys would have scared me," Ferdinand wrote in his column for the 'London Evening Standard'.
"When I was at Manchester United, the players always responded far better and raised their game when a big player came in. The kind of signing that makes everyone sit up and go 'woah'.
"Tottenham are obviously not in the same situation as Manchester United were back then. They still need to find a way to win trophies, as well as working out a way of adding players to improve the team.
"But of the four they bought, only Wanyama has made a real impact on the side. He has started very well, yet the others haven’t really added to the team in terms of goals or performances. I’m sure that is a frustration for Mauricio Pochettino at the moment.
"Tottenham are drawing too many games and I believe they have just become a bit too predictable".