#3 Vincent Janssen
Vincent Janssen was believed to be a hot prospect when he was signed from AZ Alkmaar in the summer of 2016 for almost £20m.
He was the Eredivisie top scorer, but why the Spurs board thought that his skills would transfer to the Premier League is beyond me. There is a chasm between the two leagues in terms of quality, and that has shown ever since Janssen joined the club.
Janssen featured in 27 matches in his first season, but scored just two goals. He then spent the next season on loan at Fenerbahce, where he played a bit better, but it wasn't enough to prove to anyone that he was ready to challenge for a spot in Spurs' first team.
And now this season, he's yet to play even a single game, and is currently sidelined with a knee injury.
It's safe to say that Janssen has been a terrible signing for Spurs, and they've lived to rue the decision to buy him.
Where might Vincent Janssen go?
Janssen was linked heavily with a permanent move to Fenerbahce at the start of last season, but went out on loan instead. No such interest has prevailed this time around though.
While he hasn't been linked with any club so far, Tottenham will undoubtedly be open to offers for the 24-year-old in January.