Rennes have lodged a compaint to Fifa against Chelsea, claiming the Premier League club breached regulations in order to sign the 17-year-old.
“Manchester City is aware of the ongoing contractual dispute in the French Labour Courts between Jeremy Helan and Stade Rennais,” read a statement on the club’s official website.
“The dispute between the player and the club pre-dates any interest from Manchester City.
“Manchester City obviously cannot comment on the case until the French Judicial Process has run its course, however, we are comfortable that we have acted within the rules throughout the process and in no way induced any breach of contract by Jeremy Helan.”