Barcelona delivered the most emphatic result of the day, dismantling Valencia 5-0 at the Mestalla on La Liga Matchday 4. It was a ruthless display from the Catalan giants, who never allowed their hosts a foothold in the contest. The scoreline spoke for itself — a complete performance that will send a warning to the rest of the Spanish top flight as the season gathers momentum.

Across the Channel, Arsenal claimed London bragging rights with a hard-fought 2-1 victory over Chelsea in Premier League Matchday 3. The Gunners showed resilience and composure to see off their rivals at the Emirates, a result that will bolster confidence at the club while raising further questions about Chelsea's ability to compete at the top end of the table. It was precisely the kind of derby win that can define early-season trajectories.

In France, Le Classique lived up to its billing as Paris Saint-Germain edged Marseille 3-2 in a breathless Ligue 1 encounter on Matchday 3. Five goals ensured the rivalry's latest chapter was a spectacle, with PSG ultimately holding their nerve to take all three points from the Vélodrome. Elsewhere in Ligue 1, Rennes secured a 2-1 away win at Angers to continue a solid start to their campaign.

La Liga's Matchday 4 produced further intrigue beyond Barcelona's demolition job. Alavés delivered a remarkable 5-2 rout of Osasuna, matching Barcelona's five-goal haul in what was comfortably the day's most unexpected result in Spain. Espanyol and Sevilla played out a 1-1 draw, while Málaga and Levante could not be separated in a goalless stalemate.

Serie A's Matchday 3 was defined by draws and drama. Juventus and Milan — two of Italian football's heavyweights — shared the spoils in a 1-1 draw in Turin, a result that will leave neither side fully satisfied. Bologna and Sassuolo also finished level at 2-2, while Frosinone provided the day's Italian excitement with a 3-2 victory over Venezia in a spirited five-goal affair.

In the Bundesliga, Matchday 2 brought two lopsided results as Mainz 05 hammered Hamburg 5-0 and Augsburg routed Frankfurt 4-1, both away from home — a rare day of dominant visiting performances in German football. With early-season form still taking shape across Europe's top five leagues, the weeks ahead promise plenty more twists as teams settle into their campaigns.