London Wasps back Lee Thomas has been ruled out for the remainder of the season after rupturing his Achilles.
Thomas suffered the injury in the game against Exeter Chiefs and is expected to be sidelined for six to nine months.
Thomas joined Wasps this season after two years with French side Lyon, having previously played for Cardiff Blues and Sale Sharks.
"We are bitterly disappointed to lose Lee who was really starting to find his feet in a Wasps shirt," said Wasps boss Dai Young.
"I thought he was excellent against Leicester and played very well against Exeter until he was forced off and it's a big blow to lose him for so long.
"We really feel for him as I know he was thoroughly enjoying his first few months here but we will have to focus on getting him back fit and ready for next season.
"He is a good character and once he is over the disappointment of being injured he'll be an important guy to have around with all of his experience."