Andy Murray and Cameron Norrie are set to begin their build-up to the US Open this week.
Murray will start his Washington Open campaign against Mikael Ymer on Monday night, while Wimbledon semi-finalist Norrie is in Mexico.
He has been handed a bye in the first round of the Los Cabos Open after entering his first tournament since his All England Club run.
World number 12 Norrie took the opening set against Novak Djokovic, only to exit in four, after reaching his first-ever grand slam semi-final.
Murray, meanwhile, has played one tournament since his second-round exit at Wimbledon, reaching the quarter-finals of a grass-court event in Rhode Island.
He has spoken of his determination to be seeded for the US Open – which he won ten years ago – but will need strong results over the next few weeks.
The final major of the year begins in New York on August 29.