Tommy Paul won 18 of 20 net points stopping Stan Wawrinka's inspired run 6-3, 6-2 to advance to his seventh career final in Stockholm.
Gabriel Diallo drilled Francisco Cerundolo 6-4, 6-2 advancing to his maiden ATP final and continuing a run in which he's cracked the Top 100 for the first time.
The 22-year-old Czech continues to impress as 2024 winds down.
Daria Kasatkina saved a pair of match points in the tiebreaker edging Yulia Putintseva to battle into the Ningbo Open semifinals.
Stan Wawrinka toppled Andrey Rublev 7-6(5), 7-6(5) scoring his first Top 10 win in a year to become the oldest Stockholm semifinalist in history.
Alcaraz defeated Nadal but their last meeting was all about paying respect to the 22-time major champion.
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