Derby della Madonnina — AC Milan vs Inter Milan

The Derby della Madonnina is the only major European derby where both clubs share not just a city but the same stadium, San Siro, which generates noise levels exceeding 110 decibels during matches—among the loudest recorded at any European sporting event. Originating in 1908 when Inter split from AC Milan over foreign player rules, the rivalry has been played 228 times, with Inter leading 79–75. Both sets of 75,000 fans create a visually spectacular split between red-and-black and blue-and-black. While #1 El Clásico dominates globally, this derby offers the most intense shared-stadium experience in world football.