There were two shock defeats at the US Open semi-finals in New York yesterday.
Kei Nishikori beat world number one Novak Djokovic in four sets.
He is the first Japanese tennis player to reach a Grand Slam singles final.
Kei said, "It's just an amazing feeling, beating the number one player."
Conditions were difficult for the players as temperatures reached 36 degrees Celsius.
Five time US Open winner, Roger Federer, lost to Marin Cilic from Croatia.
It will be the first time in almost ten years that the final will not feature Roger Federer, Rafael Nadal or Novak Djokovic.