Owen Bailey's first-half header saw Doncaster take the South Yorkshire derby spoils against Rotherham and continue their strong start to life back in League One.
The Rovers skipper flicked home from a James Maxwell cross in the 26th minute to decide a back-and-forth clash at the Eco-Power Stadium.
Bailey's Moment Settles a Tight Contest
Doncaster weathered an early storm from the visitors and went on to control the first 45 minutes.