Fieldside were sent spinning out of the Oxford & District Snooker League's Buildbase Cup after losing 4-2 to Cowley Con D.
The Premier Division outfit found the handicapping a bridge too far against their Division 5 rivals.
Doug Turner got Cowley off to a good start with a double win against Karl Walker.
Mick Bennett beat Simon Painter to level, but Anthony Turner defeated Mike Russell to steer the underdogs home.
Division 2 side Eynsham B also progressed against higher-placed opposition with a 4-2 win against New Club A, from Division 1.
Dan Brooks won both his frames against Ian Gee, while John Ayres and Kevin Truby picked up a frame apiece.
In the Plate Competition, Riley A, Thame B and Littlemore RBL A all progressed to the semi-finals.
A tense clash between Division 2 rivals Thame B and New Club B went to the final black in a seventh-frame decider.
Dave White and Luke Purcell shared their frames, before Nigel Bossom beat Alan King to give Thame a 3-1 lead.
Paul Moss then saw off Thame captain Tom Fletcher to send the tie to sudden death.
Bossom and King were pitched against each other again and, with only the pink and black on the table, Bossom was 52-44 ahead.
King proceeded to pot the pink to leave himself a long pot on the black.
The black went in, but to King’s horror, the white followed to hand Thame victory.
Littlemore got the better of House Club B after another sudden death finish.
Richard Berry and Tony Nicholls went head-to-head in the decider, with Berry clinching victory.
Riley A eased to a 4-1 victory against Green Road A.
The best of the league action saw Jamie Saczak hit breaks of 45 and 27 in the fifth frame of Abingdon RBL A’s draw against Riley A.
LEAGUE RESULTS Premier Division: Riley A 3, Abingdon RBL A 3; Riley A 2, Riley B 4; Witney C 3, Witney A 3.
Division 1: Green Road Club A 4, Rodney House A 2; New Club A 4, Riley D 2; Rodney House A 3, House Club B 3; Woodstock A 2, Oracle B 4. Division 2: Eynsham B 4, Highfield A (Ashton) 2; Littlemore RBL A 3, New Club B 3; Thame A 3, Abingdon Con A 3.
Division 3: Riley E 2, Witney B 4.
Division 4: House Club A 2, Headington RBL A 4; Yarnton RBL A 0, Cowley Con B 6.
Division 5: Cowley Con D 5, Littlemore RBL B 1; Headington RBL B 6, Riley F 0; Riley Vets 1, Westcott A 5.
CUP RESULTS Buildbase Cup Quarter Finals: Cowley Con D 4, Fieldside A 2; New Club A 2, Eynsham B 4; Witney B v Riley Vets pp.
Buildbase Plate Quarter Finals: Green Road A 1, Riley A 5; Littlemore RBL A 4, House Club A 3; Thame A 4, New Club B 3.
Walt Bradbury Cup: D Noake bt J Griffin Ted Allsop Memorial Cup: M Russell bt A Huxley.
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