Dundee United won the quarter-final with a score of 3-1 and St. Johnstone in the semi-final with 2-1 in the 1991 Scottish Cup Final,Scottish football's most prestigious knockout association football competition.
The 1991 Scottish Cup Final was the 106th final of the Scottish Cup, Scottish football's most prestigious knockout association football competition. In the quarter-finals, United were drawn against archrivals Dundee to set up a Dundee derby match at home. United won the tie 31 to progress to the semi-finals where they faced other rivals St Johnstone from nearby Perth in a Tayside derby. Dundee United won the match 21 and booked a place in the final for the fifth time in the past ten years following appearances in the 1981, 1985, 1987 and 1988 finals. 
The 1991 Scottish Cup Final was the 106th final of the Scottish Cup, Scottish football's most prestigious knockout association football competition. Quarter-final 31 Semi-final 21 
