LIVE: Plot twist in tense US Open semi

Carlos Alcaraz's gruelling past 2 US Open matches volition "take its toll" connected the Spanish young weapon successful his semi-final clash with Frances Tiafoe, Wally Masur says.

The Australian icon expects Alcaraz's fatigue and Tiafoe's location enactment to plaything the lucifer successful the American's favour, arsenic the 2 stars contention for a spot successful the last successful New York.

"I bash consciousness for him due to the fact that 2 five-setters is 1 thing, but finishing astatine 2.30 and 2.50 connected respective nights ..." Masur said of Alcaraz connected Stan Sport's Grand Slam Daily.

"You've got to eat, you've got to get backmost to the hotel, you get immoderate treatment, massage, astir apt get to furniture astatine 5 to six o'clock. That's got to instrumentality its toll. Two of 3 days he's had to acquisition that.

"He is young and he's awfully acceptable and helium trains hard and he'll beryllium up for the contest, but against Tiafoe you person to beryllium astatine your implicit carnal best.

"I conscionable interest that's going to instrumentality a spot retired of him."

Alcaraz and Tiafoe person lone met erstwhile connected the ATP tour, with Tiafoe claiming a two-set triumph connected clay successful Barcelona successful 2021.

Alacaraz is the 3rd effect astatine the US Open and Tiafoe the 22nd.

"I deliberation the fatigue origin for Alcaraz and the assemblage origin for Tiafoe is going to beryllium the two small elements that mightiness conscionable extremity it Tiafoe's way," Masur added.