Warrington forward David Solomona is expected to miss at least half of the 2012 season after breaking his leg in pre-season training down under.
The former Wakefield and Bradford Kiwi second row was operated on in Hospital in Randwick, Sydney.
Solomona, who will remain down under with Tony Smith's team, is expected to be out for up to five months.
"The operation was a success and David is now back with the squad and in good spirits," said a club statement.
"The club's medical staff are happy with how everything has gone so far and David will remain with the team for the duration of the pre-season training camp in Australia."
The loss of the hard-hitting Solomona, who has run in 13 tries in 48 Super League appearances in his two seasons at the Halliwell Jones, is the second close-season injury suffered by Warrington.
Already without full-back Brett Hodgson, out until March with an ankle injury, they will also start the 2012 campaign without scrum-half Richie Myler, who dislocated his elbow in their Boxing Day friendly against Widnes.
Wolves coach Tony Smith will now have just 22 players available for the friendly against South Sydney on Saturday, 28 January.