The Argentine was the man who made the difference as he came on with the score tied at 2-2.
He then scored the goals to secure the win and take Barcelona to within one win of the title.
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The reputation of the Premier League means it is the most popular and one of the most watched leagues in the world.
Five English clubs will compete in the last sixteen of the Champions League for the first time ever as Liverpool, Manchester United, Manchester City, Chelsea and Tottenham face some difficult away matches.