Inter Milan substitute Davide Frattesi struck an extra-time winner to send his side into the Champions League final following a barnstorming 4-3 victory over Barcelona on Tuesday after Francesco Acerbi had rescued them from the brink of elimination with a stunning equaliser deep in added time. Frattesi's goal and a string of stunning saves by goalkeeper Yann Sommer secured Inter a rip-roaring 7-6 aggregate victory in a semifinal for the ages that finished up with the Italian side reaching the final in Munich, where they will later this month face either Paris St Germain or Arsenal, who meet on Wednesday.

Inter Milan's Lautaro Martinez celebrates scoring their first goal. Photo: Reuters

Inter Milan's Hakan Calhanoglu celebrates scoring their second goal. Photo: Reuters

Barcelona's Eric Garcia celebrates scoring their first goal. Photo: Reuters

Barcelona's Dani Olmo scores their second goal past Inter Milan's Yann Sommer. Photo: Reuters

Barcelona's Raphinha celebrates scoring their third goal. Photo: Reuters

Inter Milan's Francesco Acerbi celebrates scoring their third goal. Photo: Reuters

Inter Milan's Davide Frattesi celebrates scoring their fourth goal with Nicola Zalewski and Stefan de Vrij. Photo: Reuters

Lamine Yamal was the standout player for Barcelona in both the ties against Inter Milan in the Champions League semifinal. However, the 17-year-old could not help his side to a first Champions League final in 10 years, and was left dejected following the game. Photo: AFP

Inter Milan's Italian defender Francesco Acerbi celebrates with coach Simone Inzaghi after winning the Champions League semifinal second leg against Barcelona at the San Siro stadium. Photo: AFP

Inter Milan goalkeeper Yann Sommer, who made a number of saves to keep his team’s hopes alive during the game, celebrates after the match. Photo: Reuters