Barcelona were made to work for their win against third-place Getafe in La Liga on Saturday while PSG were held 4-4 by Amiens in France.
Eighteen-year-old Daniel Maldini, the son of AC Milan great Paolo, made his debut for the Rossoneri right at the end of a 1-1 draw with Hellas Verona.
Inter Milan's Serie A title challenge stalled again after a 1-1 draw at lowly Lecce, leaving Juventus four points clear.
Luis Suarez provided a goal and three assists as Barcelona opened up a three-point gap at the top of La Liga after a 4-1 victory over Alaves at Nou Camp.
Real Sociedad went level on points with La Liga leaders Barcelona after snatching a 2-1 victory against Granada thanks to a late strike from Cristian Portu.
Serie A may have sounded like an old broken record for the last eight years, but the ultimate quest to overthrow Juventus' dominance has begun in earnest this summer.
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