Biggleswade Town and Arlesey Town both negotiated tricky derby clashes to progress in the Red Insure Cup on Tuesday.
A youthful Waders side saw off the challenge of an in-form Royston Town 3-2 at the Carlsberg Stadium.
The visitors, who lead Southern League Division One Central, went ahead early on when they won a penalty for a trip in the box and Chris Watters smashed home the spot kick.
Biggleswade levelled through a penalty at the other end on 34 minutes, Shane Hill converting after Oliver Lee was fouled.
Then just before half time George Bailey put the hosts a goal to the good.
The killer third came with 20 minutes to go when Michael King stole the ball and slotted home after the Royston keeper struggled to control a back pass.
Royston were awarded a second penalty for a high kick in the area - but this time keeper Jamie Head was up to the challenge and pushed Watters’ shot over the bar.
Kaan Fehmi pulled one back back late on for the visitors but Biggleswade held on for the victory.
Meanwhile Arlesey bounced back from a 7-0 hammering at the weekend to overcome fellow Southern League Division One Central strugglers Leighton Town 2-0.
The tie was goalless at the break, although the Blues did have a goal ruled out for a foul on the keeper.
They took the lead midway through the second half when Luke Abraham pounced on a loose ball from a corner to convert.
And the victory was sealed near to full time when Arlesey were awarded a penalty. The spot kick was saved but Christian Tavernier reacted quickly to slot home the rebound.
Both clubs are on their travels this weekend. Waders head to Weymouth while Arlesey visit Chalfont St Peter.