Britain's Andy Murray says he is hoping "to get through a few matches" as he plays his second singles tournament since recovering from hip surgery.
The former world number one lost 6-4 6-4 to Richard Gasquet in Cincinnati last week, in his first singles match since January's Australian Open.
He has decided to play no part in this month's US Open.
On Monday he will play the American Tennys Sandgren in the first round of the Winston-Salem Open.
"All matches are difficult at this level, and when you've been out for a long time, and with the severity of the operation I had, it is going to take time," Murray told BBC Sport.