Any side looking to be successful need match-winners throughout the team - and Spain are proving they have them as Mikel Merino delivered in his role as super sub once again to send the European champions into the World Cup semi-finals. The Arsenal midfielder stepped off the bench for the second successive game to score the decisive goal - this time securing a 2-1 victory over Belgium. There are just two examples of a player scoring the winning goal for Spain in the knockout stages of the World Cup as a substitute: Merino vs Portugal in the last 16 and Merino vs Belgium.