Left-midfield | André Schürrle
Able to cause equal damage operating as a winger or striker, the Germany international is an intelligent acquisition for the Blues.
An accomplished finisher armed with blinding speed and excellent stamina, it is difficult to judge whether or not Schürrle is a first-choice player in the eyes of Jose Mourinho.
Eden Hazard is almost certain to retain his place on the left, but could the 22-year-old start ahead of Fernando Torres, Demba Ba or Romelu Lukaku in the centre-forward role?
Even if he is not given the minutes his talent warrants, the former Bayer Leverkusen hitman should cause some serious problems for Premier League defenders in his debut season in England.