3: Ashley Cole - Arsenal to Chelsea

A tapping up scandal shrouded Ashley Cole's move from Arsenal to Chelsea in controversy back in 2005 but the left-back would go on to become one of the best signings ever made by the club.
Chelsea spent £5million and sent William Gallas to The Emirates to secure Cole and he was worth every penny.
Cole would go on to make over 300 appearances for the club, winning nine trophies with them in the process.
Edited by Arvind Sriram