Andy Murray has been drawn against Dutchman Robin Haase in the first round of the US Open.
Murray will be wary of the world number 70 having needed to fight back from two sets down to beat him here in 2011, although he was an easy winner in the Australian Open last year.
The draw was not kind to Murray, who is seeded only eighth this year. He is in the same quarter as world number one Novak Djokovic and could meet his Toronto conqueror Jo-Wilfried Tsonga in the fourth round.
British women's number one Heather Watson is in good form and back in the top 50. She meets Romanian Sorana Cirstea in the first round and could play Wimbledon finalist Eugenie Bouchard in round two.
The 20-year-old Canadian returned after a month off following her exploits in London to lose her opening matches at tournaments in Montreal and Cincinnati.
Despite ending her losing run at the Connecticut Open in New Haven this week by beating Bojana Jovanovski in the first round, she then bowed out to Australian Samantha Stosur, 6-2 6-2, in her next match.
Bouchard said: "Sam was serving amazing and hitting amazing shots. You have to give her credit.
"You can't play amazing every week. It's been a little bit of a journey since Wimbledon, but I've been improving the whole way and hopefully I can get a few days' practice and be ready for the US Open."
The standout match of the women's opening round pits two-time defending champion Serena Williams against exciting American teenager Taylor Townsend.