The aim is to find someone who can act in a support role to Petchey, who has significant broadcast commitments throughout the year.
“I just need to work on who that person is,” Raducanu added.
However, former Great Britain number one Dan Evans cast doubt on the feasibility of Raducanu’s arrangement with Petchey.
“It can’t last if she starts losing matches and Petchey is in the commentary box. That’s not going to work,” Evans, 34, told 5 Live Tennis.
“I think Emma will be looking for a new coach again pretty soon if she starts to lose some matches on the grass into the US swing. I’m not sure how that can last as it is.”
Petchey will be able to devote more time to Raducanu during the grass-court season, and the work they have been doing on the practice court is not purely targeted at clay courts.
Raducanu lost to Marta Kostyuk in the Madrid Open second round in April and says she does not “necessarily feel very comfortable” on the surface.
“I feel slightly better than I did in Madrid,” she said.
“I want to use this period of the clay season to try and work on certain things in my game that I think are going to help me bridge the gap to the next level.
“I want to take more balls on, I want to be more aggressive in certain points – I want to structure the points more on my terms.
“I know I may make more errors doing that, but I’m willing to go through that.”
World number 49 Raducanu begins her Rome campaign against a qualifier on Wednesday.
