For one set, anyway, the U.S. Open had the next best thing to a long-anticipated Rafael Nadal-Roger Federer semifinal. "This year since the beginning has been a very emotional year".
"Just the fight to be in the final, and have a chance to fight for another title here, is so important for me", Nadal said.
"If someone had told me when I started my comeback that I would make two semi-finals and a grand slam final I would have passed out", she said.
"(It's) definitely incredible feeling being in this position and have worked very hard to get here", Anderson commented.
"So I tried to move him around more and be more unpredictable".
If Nadal lifts the trophy on Sunday, he will have done it without having faced a single top-25 player.
Hours earlier, Anderson was so excited by his semi-final victory that he celebrated as if he'd been crowned champion, stepping on a chair and then a flower box to help him climb into his guest box in the stands.
But the Argentine again showed what a huge heart he possesses, saving four set points in the third set tie-break and going on to win 7-5, 3-6, 7-6 (10/8), 6-4.
Madison Keys and Sloane Stephens will contest the final after both came through their all-American semi-finals on Thursday (September 7). "For Andrey it was his first quarter-finals, so of course he played with more mistakes than usual". I don't want to say I was in negative mindset, but I knew going in that I'm not in a safe place.
"So I had many problems before this match, but I was very motivated to play the semi-final in my best tournament".
If there was one tournament where are the favorites were constant it was the one at Flushing Meadows.
'To be honest, I'm angry to lose a chance like this, but maybe tomorrow, after tomorrow, I will be calm and see how big the tournament was for me.
Del Potro, whose career was nearly ended past year after undergoing four wrist surgeries, wrapped up the first set thanks to a break in the 11th game secured with a blistering crosscourt pass.
Nadal looked as good as ever over the last three sets against del Potro, further confirming his return to the height of his powers.