Ferguson wasn't so decisive!
Leighton - in his second season at Manchester United - had been erratic all season. Bad results included a 5–1 defeat by Manchester City, a 3–0 defeat by Aston Villa on Boxing Day and a 4–0 defeat by Nottingham Forest in the last but one league game of the season. Manchester United finished in 13th place with 48 points, the same number as two newly-promoted teams, Manchester City and Crystal Palace.
In the FA Cup Semi Final, Manchester United had drawn 3-3 against Second Division Oldham Athletic, winning the replay 2-1. But Ferguson and Leighton had been together at Aberdeen, so Ferguson remained loyal to him for the Cup Final. It was only after another poor performance in the 3-3 draw against Crystal Palace that he was dropped.
Manchester United had signed Les Sealey after the transfer deadline, but he was picked for the replay, again at Wembley. He played well and Manchester United won 1-0. Leighton only played once more for Manchester United, against Halifax Town in the Football League Cup on 26 September 1990.