"But if it's not round three it could probably be round four. It's certainly not going to be round eight or nine.
"He had an arthroscope a few weeks ago because it was progressing well but he still had a little bit of pain.
"It was really positive, everything was on track and there were no issues in there. It's given him a lot of peace of mind and it's certainly been improving since then."
The Warriors are desperate to have Foran available and although he's previously shown a willingness and ability to push his body, Doyle confirmed he will not be rushed back.
"He's a very tough kid who can play through (pain) and he has done in the past. It will be partly his decision but it will be partly the medical team's decision as well."
Ahead of Friday's round two clash against Melbourne Storm at Mt Smart Stadium, coach Stephen Kearney denied the near constant media reports about Foran were proving a distraction for his side.
"Not at all," he said. "We understand the process that he's going through.
"I don't give it any energy. When it (Foran's return) arises we'll deal with it, but the focus is just making sure that we're getting ourselves in the best spot possible to play as well as we can."
Kearney is confident both vice-captain Simon Mannering (neck) and front-rower Charlie Gubb (concussion) will be fit to play on Friday, and a final call on hooker Issac Luke (ribs) will be made after tomorrow's captain's run.
Mannering and Luke both trained well today and Gubb has progressed through two post-concussion tests without any issues, with a final assessment to complete tomorrow.