The Wolves keeper picked up a knee injury during training and as a precaution will play no part in the pre-season home friendly against Reading this weekend.
"We've got to get Matt checked out but we hope it's nothing major," manager Mick McCarthy told the club's official website.Murray Doubt For Curtain Raiser
"He won't play on Saturday but there's no point thinking about Watford yet until the medical people have got their heads together.