Wolves have suffered a hammer blow on the eve of the new season after learning goalkeeper Matt Murray faces six months on the sidelines.
Murray missed last season's play-offs with a shoulder injury
The 26-year-old tore cruciate ligaments in his knee during a training session and must now undergo surgery.
Boss Mick McCarthy said: "It is a blow to us and a major disappointment for Matt. He had a great season last year and was looking forward to the new one.
"Luckily, we have an excellent young keeper in Wayne Hennessey to step in."
Murray picked up the injury last week and an exploratory operation has uncovered the extent of the problem.
He suffered a similar injury to the same left knee when on loan at Kingstonian seven years ago.
Murray has now been scheduled for reconstructive surgery, which is expected to be performed before the end of August.
With third-choice Carl Ikeme currently recovering from a knee operation of his own, Hennessey is the only fit goalkeeper on the books at Molineux.
Now McCarthy is expected to step up his search for a loan signing to provide cover for Hennessey in time for the Championship curtain-raiser against visiting Watford on Saturday.