After Cristiano Ronaldo had stretched a supple leg to turn in his 901st career goal and down Scotland, he tore away to the corner flag to perform his customary celebration with all the gusto of a man scoring his first. The 39-year-old has exited the main stage in club football with his move to the Saudi Pro League, and his ecstasy at coming up with yet another big goal for his country at a a packed and rowdy Estadio da Luz tells you he probably knows it. Having been left on the bench and unleashed at half-time by Roberto Martinez with Scotland 1-0 up, the game almost instantly became the Ronaldo show.