David Moyes says he "quite likes" his players fighting each other after Everton's Idrissa Gueye was sent off for striking team-mate Michael Keane in the face during his side's 1-0 Premier League win at Manchester United.
United's Bruno Fernandes had just gone close to scoring when Gueye and Keane began arguing in the 13th minute at Old Trafford, with the game goalless.
Defender Keane appeared to twice push Gueye away before the Senegal midfielder hit him with an open hand.
Everton's England goalkeeper Jordan Pickford separated the pair before referee Tony Harrington showed Gueye a straight red card for violent conduct.