Wheatley Hill WMC needed extra time before knocking Bishop Auckland Reserves out of the of the Clem Smith Bowl.
In a tight first round clash, Wheatley did just enough to win through 4-2 following the extra half hour.
Shaun Jackson led the way with a well-taken double, supported by strikes from Joe Smith and Tony Ogden, with David Jackson their man of the match.
Battling Bishops Reserves had Thomas Fisk and substitute Adam Lee-Shield on target, with Marcus Pinder their man of the match.
Hall Farm Glasshus endured a 4-0 drubbing as they crashed out.
Hosts Blackhill & Ebchester proved too strong on the day, with man of the match Michael Hannant, Stephen Agnew, Richy Parkin and Jonny Parkin also getting in on the act.
Thomas Foster stood out for Hall Farm.
Durham City Reserves made good progress with a 4-1 victory away to Billingham.
Man of the match Liam Butler stole the show with a clinical hat-trick, while Daniel Knowd also notched.
Jack Hart notched for the Teessiders, with Martin Howson their top performer.
Newcomers West Auckland Tuns battled hard to claim a point from a 1-1 draw against Sherburn Village WMC, though they are still seeking a first league win.
Nick Marley netted for Sherburn, but the hosts had Paul Jordan on target, despite being reduced to 10 men when substitute Peter Roderick was sent off.
Jamie Whitworth maintained his good form to be West’s man of the match, while Andrew Hope got the nod for Sherburn.