Alexander Zverev came from two sets down to beat Pablo Carreño Busta 3-6 2-6 6-3 6-4 6-3 at the US Open.
Zverev is now in his first Grand Slam final.
"I looked at the scoreboard after two sets." "I thought to myself, 'Look, I'm playing a Grand Slam semifinal, I'm down 6-3, 6-2 in a match where on paper I'm supposed to be the favorite.'
At age 23, he is the youngest men's Grand Slam finalist since Novak Djokovic.
