Los Blancos cruised to a 4-0 win thanks to goals from Gonzalo Higuain, Angel di Maria, Michael Essien and Luka Modric.
Mourinho is only the fifth man to reach the milestone, and it was all the sweeter as rivals Atletico Madrid lost their unbeaten run to Valencia.
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Summer 2016 is set to be a very exciting time for football fans, as this is when the long awaited Euro 2016 tournament kicks off.
Since Guus Hiddink arrived at the helm, Chelsea have improved considerably after a tricky start to the campaign.