New York is known as the city that never sleeps. But that comes at a price for US Open stars - including men's semi-finalists Ben Shelton and Alexander Zverev.
Bed at 6:45am - US Open semi-finalists fight effects of late-night finishes
This is a summary. Read the complete story at the original publisher:
Read the full article on BBC Sport →Source: https://www.bbc.co.uk/sport/tennis/articles/crk3jjp2l35o?at_medium=RSS&at_campaign=rss