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.
What is your opinion? Feel free to discuss the article under. You have to comment by using your Facebook profile. Be fair and have respect for other people and opinions!
Since Guus Hiddink arrived at the helm, Chelsea have improved considerably after a tricky start to the campaign.
Newcastle United are staring down the barrel of relegation to the Championship for the second time in the past eight years.