By Jamie Spencer Robert Lewandowski has revealed that he had “decided” to join Manchester United when Sir Alex Ferguson was still at the club, meaning his career could have unfolded very differently. The Pole has scored almost 700 career goals for club and country since he first turned out for Delta Warsaw in the fourth tier of Polish football as a 16-year-old. The opportunity to move to Old Trafford came after he had started to make his name with Borussia Dortmund, some time after a proposed move to Blackburn Rovers had fallen through because of an ash cloud from a volcanic eruption in Icelan…