NEW YORK — This was a match that would not end. Should not end, one might say. Carlos Alcaraz and Jannik Sinner, two of the brightest young stars of men’s tennis, traded shots of the highest quality and countless momentum swings across five sterling sets for 5 hours, 15 minutes until Alcaraz finally won the last point at 2:50 a.m. Thursday, the latest finish in US Open history.
It was “only” a quarterfinal, no trophy at stake, yet was as taut…