After beating Scarborough 2-0 on Monday through two Clayton Donaldson strikes, results went City's way on Wednesday for them to win the Avon Insurance Division One East league.
They followed that up with a 3-2 win against Chesterfield in the League Cup semi-final at Boothferry Park last night.
Ex-Tiger Caleb Folan gave the visitors the lead, but ex-Spireite Ryan Williams equalised with a penalty just before half time.
Jeremy Mitchell put Chesterfield back in front before Alistair Benson restored parity from Russell Fry's cross.
The duo teamed up again to get the winner minutes later. Nathan Peat's corner was flicked on by Fry to Benson, who scored to make it 3-2.
City line-up: Musselwhite, Heard, Peat, Philpott, Chapman, Burton, Fry, Turnbull, Benson, Donaldson, Williams.