Lautaro Martinez scored the opening goal of a thrilling second leg. AFP
Inter captain Martinez almost didn't play at the San Siro after being injured in last week's first leg, drawn 3-3 in Catalonia, but recovered to start another thrilling match which ended with the Italians winning 7-6 on aggregate.
The 27-year-old scored Inter's opener and won the penalty from which Hakan Calhanoglu netted their second on the night, a two-goal half-time lead which ended up being eaten up by Barca before Francesco Acerbi and Davide Frattesi won an enthralling tie.
"The first two days I just sat at home crying, but we did great work with the staff and I managed to recover," Martinez told Sky Sport.
"You've got to give your all in these games. I promised my family that I would get on the pitch today."
Inter will play either Paris Saint-Germain or Arsenal in the final, which will be played in Munich on May 31.
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