Coventry City supporters can start looking at how to get Stevenage next season after the Broadhall Way club were beaten 1-0 in the second leg of the League One Play-Off Semi-Final.
Porter scored the goal for Sheffield United in the 85th minute to send them to Wembley and end Stevenage's chances of three promotions in three successive seasons.
Former City midfielder Michael Doyle played for Sheffield United whilst Stevenage who had former City trialist Chris Day in goal, used Craig Reid as an 87 minute substitute.