Kevin De Bruyne
The Belgian playmaker made only four Premier League appearances for Chelsea before leaving for Germany in January 2014, but Jose Mourinho may now regret letting him go.
After inspiring Wolfsburg to a second-place Bundesliga finish this season, De Bruyne has become a hot commodity again and Man City are reportedly in talks with his agent over a £50m transfer.
The mercurial Bulgarian delighted neutrals with his sublime touch and laid-back approach during spells at Tottenham Hotspur, Manchester United and Fulham before moving to AS Monaco in 2013.
Newly-promoted Bournemouth are apparently considering a bold move to add his class and experience to the strike force which ripped up the Championship last term.