Yann Sommer committed another game-defining mistake in Inter Milan’s heartbreaking 1-0 defeat to AC Milan last night.

According to Gazzetta dello Sport via FCInterNews, the 36-year-old was not the only underperforming Inter star.

Indeed, Hakan Calhanoglu endured one of his worst evenings in the Nerazzurri shirt.

Despite his outstanding start to the season, the 31-year-old midfielder faltered when the stakes were high.

In addition to missing his second penalty in Serie A, Calhanoglu lost the ball in the build-up to Milan’s second-half winner.

Yann Sommer Flops in Inter 0-1 AC Milan Loss

Yann Sommer Inter Milan
MILAN, ITALY – DECEMBER 12: Yann Sommer of FC Internazionale gestures during the UEFA Champions League match between FC Internazionale and Real Sociedad at Stadio Giuseppe Meazza on December 12, 2023 in Milan, Italy. (Photo by Marco Luzzani/Getty Images)

Yann Sommer couldn’t deal with Alexis Saelemaekers’ long-range shot.

Though the Belgian’s low effort looked destined for a bottom corner, Sommer had to do better.

Instead, his ‘soft’ deflection set Cristian Pulisic up perfectly, with the USMNT ace tapping the ball home from close range.

It’s also worth noting that Manuel Akanji lost sight of the Rossoneri talisman.

Akanji’s rare mistake heavily contributed to Milan’s sixth consecutive unbeaten match against the Nerazzurri.

However, Sommer could pay the price for Inter’s dismal derby loss.