Ryan Barnett's first goal of the season ensured Wrexham returned to winning ways with a 1-0 success over fellow League One high-flyers Mansfield.
AFC Wimbledon beat bitter rivals MK Dons for the third time in a row after a 2-0 win at Stadium MK in the FA Cup first round.
Mansfield battled back to earn a deserved 1-1 home draw against League One leaders Birmingham.