Oxford United needed penalties to get past League Two MK Dons, while Port Vale and Wigan Athletic also booked a place in the fourth round.
Sheffield United came from behind to claim a 4-2 win over Wrexham in the EFL Cup first round, leaving Chris Wilder pleased with what he saw.
Huddersfield Town failed to get a vital win over rivals Birmingham City, while League Two's final day cleared up the play-off picture.
Town set for highest position since promotion.
No results available
No matches available.