Lucas Moura scored a 96th-minute winner to complete both his hat-trick and the most remarkable of Champions League comebacks for Tottenham.
Ajax took a 1-0 first leg into what would turn out to be a dramatic reverse at the Johan Cruyff arena, and by half-time were 3-0 up on aggregate thanks to goal from captain Matthias De Ligt and forward Hakim Ziyech.
However, Lucas Moura scored twice in three minutes early in the second half to give the visitors hope.
Both sides struck the woodwork as Spurs looked for the strike that would send them to the final on away goals, but it was deep into stoppage time that Moussa Sissoko’s long ball was helped on by Dele Alli and Lucas squeezed his effort past Andre Onana to send the away end into ecstasy.
Spurs will now face fellow English side Liverpool, who pulled off an extraordinary comeback of their own to see of Barcelona in the other semi-final, in the Madrid showpiece next month.
Follow the action LIVE with Standard Sport!
