Ian Ladyman admitted he may have incorrectly accused Marcus Rashford of diving to win a penalty in Manchester United's win over Nottingham Forest last week.
United's faltering start to the season continued on Saturday, with Erik ten Hag's side going 2-0 down in the first five minutes after goals from Taiwo Awoniyi and Willy Boly.
Christian Eriksen hit back for the hosts in his first start of the season before Casemiro put United level after half-time.
With Forest reduced to ten men after Joe Worrall's sending off, Marcus Rashford would controversially win a penalty on 76 minutes after he was adjudged to have been fouled by Danilo, allowing Bruno Fernandes to complete their comeback.