Andy Murray dropped to 839 in the world rankings following his injury problems.
Murray is due to return to action at the Citi Open, which starts in Washington on 30 July.
The former world number one fell 690 places in Monday’s rankings after he pulled out of Wimbledon.
Murry had hip surgery in January , since last year’s Wimbledon.
He has only played three matches since then, winning one at Eastbourne last month.
Murray will be able to enter the Masters events under the exemption available to players coming back from long-term injury.