Undermanned Bayern, nursing a bulging casualty ward, set the tone in the first half-hour, with Michael Olise and Harry Kane narrowly failing to break through.

Inter opened the scoring on the 38-minute mark when Marcus Thuram's clever back-heel found Lautaro Martinez who blasted home.

The Italians maintained control until Bayern veteran Thomas Mueller, days after announcing a summer departure after 25 years at the club, scored the equaliser with a typical poacher's finish with five minutes remaining.

Not content to be spectators to a Bayern fairytale ending, Inter broke on the counter just three minutes later, with Carlos Augusto finding Frattesi, who scored Inter's second.

Inter, defeated in the final by Manchester City two seasons ago, have their noses in front in their bid to make the last four of the competition.

The late goal consigned Bayern to their first home defeat in the Champions League since 2021, a run of 22 matches.

Semi-finalists last season, Bayern's preparation for the game was hampered by an injury crisis. The German giants were particularly hard hit in defence, with England veteran Eric Dier and Kim Min-jae the only two fit centre-backs.

Inter had their own injury woes in the rematch of the 2010 Champions League final but welcomed the news that Alessandro Bastoni, subbed off at halftime in Serie A on Saturday, was fit to start.

Bayern coach Vincent Kompany replaced the injured Jamal Musiala by moving left-back Raphael Guerreiro to the number 10 position behind Kane, leaving veteran Mueller on the bench.

The hosts dominated the opening half hour, with Olise carving up the Inter defence at pace, but without finding the breakthrough.

Olise flashed just wide with seven minutes gone, hit a shot straight at Yann Sommer on the quarter-hour mark and found Kane to head at the 'keeper shortly after.

The English-born France international dribbled through Inter's defence to create Bayern's best chance of the opening half, finding an unmarked Kane but the England captain hit his effort against the far post.

Inter's forays into Bayern territory were brief but their confidence grew.

The Italians were ahead shortly before half-time, Thuram  backheeled blind to Martinez who blasted into the top of the net.

Once ahead, Inter found the control which had eluded them earlier, managing the tempo and the tone of the match.

With 56 minutes gone, Bayern's rookie goalkeeper Jonas Urbig kept Martinez out with a superb reflex save at the near post.

Kompany brought Mueller on with 15 minutes remaining and the Bayern veteran seemed to have given the match a fairytale ending in typical fashion, catching the Inter defence napping to tap in at the far post.

The goal was just the third Inter have conceded in 11 games in Europe this season.

Three minutes later however, Inter broke on the counter, Augusto finding Frattesi to guide home.