The 36-year-old left Stamford Bridge at the end of last season following the expiration of his contract, bringing to an end a 13-year association with the club in which he became their all-time leading goalscorer (211) and third all-time appearance maker (648).
Out of contract, he completed a free transfer to new MLS venture New York City FC, bought in a joint venture by the Premier League champions and the New York Yankees.
But with NYCFC not entering MLS until the start of the 2015 season in March, Lampard has made the move back to Eastlands in a bid to keep his fitness up and contribute to Manuel Pellegrini's squad.
Blues fans won't have imagined they would have to face their hero so soon after his departure, but that is exactly what could happen on September 21 at the Etihad Stadium.
And while 40 per cent of readers say he has tarnished his legacy by moving to a fellow Premier League club, 60% say he will remain a Chelsea legend regardless.