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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Who of Europe’s top strikers will move to England this summer?
After a dreadful start to their Bundesliga campaign, Borussia Dortmund appear to have weathered the storm after going five matches without defeat.