Seam bowler Harry Smith returned figures of 5-1 to give Warriner (Bloxham) a 26-run victory over Magdalen College School (Oxford) in Daily Telegraph Under 15 Twenty20 Cup quarter-finals.
Smith's stunning spell, backed up Adnan Iqbal (2-3) saw MCS crash to 48 all out after Warriner had mustered 74-9 on a very damp wicket.
Bloxham squeezed past Oxford by three wickets in a low-scoring affair.
Charlie Cox 3-5, Will Ducker 3-6 and Greg Fletcher 2-13 combined to roll over Oxford for 49, but Bloxham were then made to battle before reaching 50-7.
Tom Price hit an unbeaten 70 to set Abingdon on the way to a 55-run win over King Alfred's (Wantage).
Price's knock took Abingdon to 138-5, and then King Alfred's were held to 83-6, despite Ryan Gordon hitting 62 not out as Ben Stockwell took 3-18.
In the semi-finals, Abingdon visit Bicester, who made 120-5 before bowling out local rivals Cooper for 60.
In the Oxon Under 17 Cup, Nick Burton starred for King Alfred's (Wantage) with 52 to hand Cheney a 47-run defeat.
Burton's knock helped King Alfred's post 115-8, and Cheney were then dismissed for 68.
Callum Todd hit 56 of Cherwell's 107-2, but it proved in vain as holders Burford eased home at 108-4.
In the Bunbury Under 12 Cup, Lord Williams's (Thame) recorded a dramatic one-wicket win over Gosford Hill (Kidlington) in a last-ball thriller.
Marcus Jeacock scored 43 not out in Gosford Hill's 74-4, but Lord Williams's scraped home with 75-9.
In the Oxfordshire Under 13 League, St Birinus's Dan Stainthorpe took 3-5 as John Mason (Abingdon) were bowled out for 47.
The Didcot school then scored 48-2 to win easily.
In the same group, Wallingford had an exciting four-run win over John Mason.
Bowled out for 110, Wallingford dismissed John Mason's last batsman with the final delivery and the score on 106.
Archie Henderson (41) and Nick Moody (36) helped Burford score 103-3 to chase down Cherwell's 99-5.
OTHER RESULTS
Oxfordshire Under 15 League
B lessed George Napier 28, Chipping Norton 30-6.
Gosford Hill 87-4 (S Dennett 25), St Gregory the Great 88-4 (A Huish 64no).
Larkmead 70 (R Keat 4-11), St Birinus 74-1 (H Latimer 32no).
Lord's Taverners Under 14 Trophy
Lord Williams 61 (George Bull 4-10), Abingdon 62-4 (William Bibby 24).
Oxfordshire Under 14 League
Bartholomew 54, Chipping Norton 55-8.
Wallingford 40, John Mason 40-1.
Oxfordshire Under 13 League
Bartholomew 111-4, Chipping Norton 75.
John Mason 47 (D Stainthorpe 3-5), St Birinus 48-2.
Oxfordshire Under 13 Cup
Blessed George Napier 37, Henry Box 39-2 (Josh Crossley 31no).
Oxfordshire Under 12 Pairs League
Cooper 253-3, Gosford Hill 208.
Henry Box 265, Bartholemew 212.
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