Rafael Nadal of Spain celebrates after winning his Men's Singles semi-final match against Matteo Berrettini of Italy on day twelve of the 2019 US Open at the USTA Billie Jean King National Tennis Center
Berrettini at one point indicated that a mighty tussle would be on the cards as he raced to a 4-0 lead in the opening set tie-break, but thereafter Nadal stamped his authority on proceedings.
After the bizarre tie-break, which Nadal eventually won 8-6, the 33-year-old assumed control with a two-set lead after two hours - and the Italian could not respond.
The second set was much more comfortable for the Spaniard, and the third even more so as he immediately seized a break of serve to ensure his opponent could not get a foothold.
Rafael Nadal of Spain celebrates a point against Matteo Berrettini of Italy during their Singles Men's Semi-finals match at the 2019 US Open at the USTA Billie Jean King National Tennis Center in New York
Image credit: Getty Images
When Nadal broke for a second time in the third set to grab a 4-1 lead, the match was as good as over and he was able to coast through to seal it.
It has been a remarkable run for the 23-year-old Italian, but he simply did not have enough quality to reach the final against such a formidable opponent.
"The first set was a little bit frustrating because I had a lot of break points and you don't want to be in a tiebreak against a player like Matteo," said Nadal.
"I survived that moment and finally I had the break ... I think I started to play with more calm and was more aggressive.
"I just tried to stay focused on the next point."
Nadal can move to within just one Grand Slam of Roger Federer's career tally of 20 if he clinches victory over the hugely impressive Medvedev, who overcame Grigor Dimitrov, on Sunday.
The pair's only previous meeting took place in the final of the Montreal Masters and Nadal was a convincing 6-3 6-0 victor.