sentences:  When they were introduced for the 1986–87 season, the play-offs originally featured a top-flight team as well as the three second-tier clubs.This format was continued for the 1987–88, but discontinued afterwards to include only the four teams who finished behind the team or teams winning automatic promotion.As before, the semi-final and final were both two-legged and held at the home grounds of the two teams involved, apart from 1987, when Charlton Athletic and Leeds United could not be separated over two legs with the tie settled at a third match at St. Andrews, Birmingham.