Their fate is ironically sealed when former player Denis Law scores the winning goal for Manchester City at Old Trafford with his final touch in league football .
Birmingham City 's victory would have condemned them to relegation regardless of the outcome of United 's game .
Their fate is ironically sealed when former player Denis Law scores the winning goal for Manchester City at Old Trafford with his final touch in league football , but Birmingham City 's victory would have condemned them to relegation regardless of the outcome of United 's game .