Manager Stuart Peace says Didcot Town must cut out the sloppy defensive mistakes if they are to beat Chippenham Town in tonight's FA Trophy second qualifying round replay at the npower Loop Meadow Stadium.
Peace's side threw away a 2-0 lead at the British Gas Business Southern League Premier Division outfit on Saturday before drawing 3-3.
"Two of their goals came when we switched off at the back," said Peace. "We were a bit sloppy. If we can cut that out, then we will have more to offer."
Didcot add Grant Goodall to the squad, while Dave Green faces a late fitness test on a back injury.
The winners will host former Football League club Newport County in the third qualifying round on November 25.
Banbury United, 2-0 conquerors of Marlow on Saturday, face a tough task after being drawn at home to Nationwide Conference South outfit Lewes.
Oxford United enter the competition at the second-round stage.
Abingdon United will host Coca-Cola League Two side MK Dons at home in the Berks & Bucks Senior Cup if they beat Burnham in tonight's second-round tie.
Oxford City travel to Yeovil in the FA Youth Cup first round tonight.
The winners will be away to either Rushden or Brentford in the second round on November 25.
Oxford United will book a trip to Gillingham or Stevenage if they win at Leyton Orient tomorrow (7).
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