Spurs fans' poll: Who has been Tottenham's best signing of 2015?
PUBLISHED: 11:52 31 December 2015 | UPDATED: 11:52 31 December 2015
Heung-Min Son (left) and Dele Alli both signed for Spurs in 2015
PA Wire/Press Association Images
The January transfer window opens on Saturday, but who has been Tottenham's best signing over the past 12 months?