A second trip to Cantley Park once again yielded four goals, but it was a different result for the Millers, who were defeated in their opening Youth Alliance Cup of the 2019/20 campaign.
A second journey across to Doncaster in as many games saw the hosts this time race into a three-goal lead through goals from Junior Smith (2) and Jack Watson, left the Millers youngsters with an uphill battle on their hands.
There was some pride restored as Jacob Gratton tucked home a 70th-minute consolation but the Youth Alliance Cup tie was already wrapped up.
Millers | Farrar; Hanley, Beeden, Hull, Smith; Peel-Evans (McGuckin 64), Spence, Gratton, Hodgkinson; Kenny (Gateshill 32), Greaves.