Accrington Stanley conceded three second half goals as John Coleman's side suffered a 4-1 defeat to Oxford United.
James Henry gave the visitors the lead just before half-time, with Ryan Cassidy drawing the Reds level from the penalty spot after the break.
Karl Robinson's side regained the lead almost immediately after, with Dion Charles then receiving a red card just two minutes later for an alleged stamp.
Oxford's Matty Taylor secured the victory for the visitors as he grabbed two goals for himself in the last five minutes.