Oxfordshire beat Guernsey 4-2 on penalties in a thrilling South West Counties Mick Parry Memorial Trophy second-round tie.
The first ever meeting between the sides, switched to the University Parks ground due to the weather, proved a close encounter with no goals until extra time.
Oxon went ahead when a cross from Joe Burrows was firmly headed home by Daniel Keen, but Guernsey equalised with a scrambled goal from a corner to force penalties.
In the shoot-out, Daniel Mason, Burrows, Daniel Welsh and Keen were all successful from the spot, while Daniel Morgan's effort was saved.
Guernsey converted two of theirs while one was saved and another went wide of the mark.
The Oxfordshire squad for the FA County Youth Cup second-round tie against Hampshire at Thame Utd FC on Sunday (2pm) is:
O Bunce (Thame Utd), L Joshua (Oxford City), T Bielec (Thame Utd), D Mason (Garden City), M Harris (Thame Utd), T Gubbins (Garden City), I Braun (Thame Utd), C Catchpole (North Leigh), D Morgan (Abingdon Town), D Keen, J Burrows, D Welsh, J Cattell (all Thame Utd), L Holden (Garden City), C Brain (Thame Utd), D McGing (North Leigh).
Thame Boys saw off Abingdon Town 3-1 after extra time in the Elsevier Youth League's Under 17 KO Cup.
Abingdon went ahead in the first half when Williams outpaced the Thame defence and unleashed a great strike.
Thame replied with Michael Kendal-Smith's penalty to force extra time, during which Adam Faulkner and a second spot-kick from Kendal-Smith sealed the verdict.
Kennington were outgunned 4-0 by Oxford City who went ahead just before half-time through John Sparrowhawk. On target for the City in the second-half were Mark Denslow, Anthony Cook and James Allen.
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