Second seed Rafael Nadal powered past France's Richard Gasquet to set up a US Open final against world number one Novak Djokovic.
The Spaniard, 27, was tested in the second set but came through 6-4 7-6 (7-1) 6-2 in two hours and 21 minutes.
Nadal, the 2010 champion, extended his unbeaten run on hard courts this year to 21 matches - despite dropping serve for the first time in the tournament.
World number one Novak Djokovic reached his fourth straight US Open final with a stunning five-set win over Stanislas Wawrinka in New York.
Djokovic came back from a set and a break down - as he had against the Swiss ninth seed at the Australian Open in January - to win 2-6 7-6 (7-4) 3-6 6-3 6-4.
Like the Women's tournament, no surprises as to who the finalists are. Nadal may be ranked second in the world but that is because of having missed grand slam events through injury. It is likely that by the end of the US Open he will be champion and regain the number one place in the rankings.