The 25-year-old Van Rijthoven is working on an impressive grass season. In the run-up to Wimbledon he very surprisingly won the grass tournament of Rosmalen.
For the Brabander, the coming weeks placement for the US Open is at stake.
The US Open starts on August 29.
In 2000, Peter Wessels caused a stir by winning the ATP tournament in Newport. That was the only title for the former number 72 in the world.
Tim van Rijthoven has been directly admitted to the main schedule of the tennis tournament in Newport, which starts on Monday.
The Dutchman, who on Sunday against Novak Djokovic stranded in the fourth round at Wimbledon, was first reserve but moves on to the main tournament after the cancellation of the American Jenson Brooksby.