MILAN (Interstat) — In a stunning upset that defied statistical projections, AC Milan opened its Serie A campaign with a narrow 1-0 victory over a heavily favored Lazio side on Saturday at Stadio Giuseppe Meazza.

The match, a solitary fixture on the league calendar for Nov. 29, 2025, was decided by a second-half goal from Portuguese forward Rafael Leão, handing the home side a winning start to the season while handing the visitors an immediate setback.

The contest was a physical, tactical affair, largely devoid of clear scoring opportunities for either side. Lazio, which entered the match with a staggering 92.80 percent probability to win according to Interstat’s ELO system, controlled large portions of possession but struggled to break down a resolute Milan defense.

The game’s first significant action was a disciplinary one, as Milan defender Fikayo Tomori received a yellow card in the 26th minute for a tactical foul that halted an early Lazio foray.

The deadlock was finally broken six minutes after the halftime interval. The decisive moment began with a defensive contribution, as Tomori atoned for his earlier booking by initiating the attacking sequence. His involvement was part of a complex build-up that saw a remarkable six different players credited with an assist on the play, a rare statistical occurrence highlighting a sweeping team move. The ball eventually found Leão in a dangerous position, and the dynamic forward made no mistake, slotting his finish past the Lazio goalkeeper in the 51st minute to send the majority of the 75,000 spectators into a frenzy.

The goal stood in stark contrast to the pre-game simulation from Interstat, which had projected a 1-1 draw.

Lazio’s frustration began to show in the aftermath of the goal, with the match becoming increasingly stop-start due to a flurry of cautions. Lazio substitute Luca Pellegrini was booked in the 57th minute, and Milan’s Matteo Gabbia joined his center-back partner Tomori in the referee’s book with a yellow card in the 64th minute.

As Lazio pressed for an equalizer, the physicality intensified. Another Lazio substitute, Alessio Romagnoli, was shown a yellow card in the 72nd minute against his former club. The visitors’ attempts to mount a comeback were further hampered when midfielder Samuele Ricci received a caution in the 89th minute, and fellow substitute Mattia Zaccagni was booked deep into second-half stoppage time.

The final whistle confirmed a vital three points for AC Milan, immediately improving its record to one win and no losses in Serie A play. For Lazio, the loss was a disappointing beginning to its league season, leaving the Roman club with an initial record of no wins and one loss.

The result served as a powerful statement from AC Milan, proving that pre-game algorithms and probability models are no match for a disciplined defensive performance and a single moment of attacking quality.