While four Americans dominate the semifinals of the on-going U.S. Open Tennis Championship in the women's event, South Africa's Kevin Anderson, who will face Spain's Pablo Carreno Busta, is the only non-Spanish speaking player in the semifinals, as top seeded Rafael Nadal dismissed his protégée Andrey Rublev of Russian Federation 6/1; 6/2; 6/2.
However, Del Potro's huge forehand and thunderous serve are as risky as they have ever been and he will go into the semi-final knowing that he beat Nadal at the same stage of the tournament when he won his only Grand Slam title here eight years ago.
The 37-year-old Williams is the only member of the quartet who has participated in a Grand Slam singles final.
But the 6-foot-6 del Potro played spoiler.
Following Friday's win, ESPN asked Nadal on court whether he thought a year ago - when he lost in the round of 16 in NY - that he would reach three major finals in 2017 with the chance to win two titles. "But here we are".
The Spaniard, who lost to del Potro in the 2009 semifinals but had not lost a major semifinal since, winning 14 in a row, was overpowered in the opening set but turned the tables in the second and never looked back. Maybe it was all too much for del Potro, whose one Grand Slam title came via wins over Nadal in the semifinals and Federer in the final in NY eight years ago.
Del Potro, whose career was nearly ended a year ago after undergoing four wrist surgeries, wrapped up the first set thanks to a break in the 11th game secured with a blistering crosscourt pass. With 8185 points, Nadal stays atop and is on the cusp of gaining 480 points if he can defeat del Potro in the semis.
An exhausted Del Potro began netting easy shots and again found himself down an early break in the fourth set.
But after back-to-back emotional matches to get here, the Argentine used up whatever energy reserve he had left in the first set.
Del Potro joked that he would try not to run too much "because my legs are tired".
If you are on the go and you don't know how to watch the match, have no fear!
It's this first match where I start tonight's previews, with Anderson trading at [1.44] at this time on the Exchange to make the final.
'I changed it, it worked very well and I'm very happy'.
"I feel like I'm just being a bit more patient with myself". From that moment, the Argentine always looked in control, right up until he clinched the win with an unstoppable driving forehand down the line. But the most important thing is to play at my best level.
Top seed Nadal is now also guaranteed to keep hold of the number one ranking ahead of Federer.
On resumption, he won the first game of the third set with a service victor.
Nadal celebrates a point during his semifinal win.
Anderson, 31 years old and ranked 32nd in the world, is the lowest-ranked Grand Slam finalist since 38th-ranked Jo-Wilfried Tsonga fell at the 2008 Australian Open final. In Sunday's final, the world number one will face 32nd-ranked Kevin Anderson, the first South African in the championship match in 52 years.
That was the last time Nadal lost in a major semifinal; he's now won 15 in a row.