The Etihad Player of the Month vote is now open.
Sterling took the August vote while Kevin De Bruyne was voted September's outstanding performer.
In what was a disappointing month overall, Sterling was one of the Blues' more consistent performers and Otamendi has enjoyed an excellent start to life under Pep Guardiola.
Gundogan finished the month as October's joint top scorer with his two goals at West Brom.
The poll closes next Monday, 7 November at noon.
Vote for your favourite and one lucky UK-based entrant who picks the winning player will get to present the award in person at the CFA.