 Complete the following phrase:  The team was chasing a unique treble of League championship, FA Cup and European Cup with Gray in sparkling form. He had already scored what many Leeds fans call the greatest goal ever by a Leeds player  a solo run past several Burnley players which involved flicks and dragbacks as he somehow got to a shooting position from a position on the goal-line well to the left of the goal  when his day came at Wembley for the 