Colston maintained their fine start in Mixed Division 1 of the 2-Pair League by beating Oxford Sports 2.5-1.5.
Second pair Chris Hand and Clare Abbott made the crucial breakthrough for Colston, taking a set off Steve and Clare Roberts, who went on to beat Tim Manners and Liz Bamber 6-4, 6-4.
Abingdon A, chasing Colston hard, brushed off the challenge of Banbury West End 2.5-1.5 with Ole Andersen and Alison Haynes undefeated.
Bicester A's title hopes received a dent as they were held 2-2 at Wantage, although it looked a lot worse at one stage.
They were heading for defeat until Craig Naylor and Kim Buffham hit back in style to beat Steve Pugh and Carole Smythe 1-6, 6-3, 6-0.
Gavin Crickmore and Ruth Ballantyne were in top form for Blewbury A as they won 2.5-1.5 at Watlington in Division 2, dropping just three games in four sets.
2-PAIR LEAGUE RESULTS Mixed Div 1: Colston 2.5, Oxford Sports 1.5; Wantage B 3.5, Cholsey 0.5; Abingdon 2.5, Banbury WE1.5; Wantage A 2, Bicester 2. Div 2: Watlington 1.5, Blewbury 2.5; Goring 4, Nor Gardens 0; Benson B 0, Esporta 4. Div 3: Goring B 2, Southfield 2. Div 4: Portcullis 3, Brackley 1; Banbury A 3, Mapledurham B 1; Banbury B 3.5, Ox City 0.5; Thame 3.5, Wantage C 0.5. Div 5: Abingdon C 1, Wychwood 3; Kings Sutton B 1, North Oxford 3; Norham Gardens B 2.5, Abingdon D 1.5. Div 6: K Bagpuize 1.5, Witney 2.5; Ox Sports C 4, Southfield B 0; Portcullis B 1, David Lloyd 3.
Men's Div 4: Mapledurham 2, David Lloyd 2. Div 5: North Oxford 0.5, Wheatley 3.5. Div 8: Thame C 1.5, Appleton B 2.5.
Ladies' Div 1: K Bagpuize 0.5, Cholsey 3.5. Div 6: Charlbury B 0.5, Abingdon C 3.5
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