England captain Michael Vaughan has undergone surgery to repair cartilage damage in his right knee.
Vaughan hopes the surgery will help prolong his career
It is the fourth time during his career that the 31-year-old has been operated on because of knee problems.
He is likely to be out of action for between four and six months, which means it is unlikely he will play in this winter's Ashes series.
The England and Wales Cricket Board has declined to say which hospital Vaughan is using, but it is in the UK.
Vaughan took the decision to opt for more surgery last week after being forced to abort his comeback with Yorkshire.
"Our priority now is to safeguard Michael's long-term interests and ensure that he can resume his playing career," said ECB medical officer Dr Peter Gregory.
"He will have our full support and we will be closely monitoring his progress in conjunction with the staff at Yorkshire who will supervise his day-to-day rehabilitation programme."
England, meanwhile, start a Test series against Pakistan on 13 July.
And it is likely that all-rounder Andrew Flintoff, who took over as captain when Vaughan broke down in India earlier this year, will miss the game at Lord's because of ankle trouble.
He is not due to be reassessed until the week of the Test.
"We are going down the route of physio and exercises to strengthen the ligaments around the ankle," Flintoff said last week.
"I'm not running at the moment, I'm doing a lot of cycling. I'm doing things that don't cause pain and trying to tick over.
"So far it's been good, there are no adverse effects."