The 34-year-old will be out for a minimum of six months, ruling him out of the World Cup and raising doubts over his entire career.
Savage was sidelined with the same injury for 11 months and said: "He'll be gutted. He's worked hard to get to a stage where he's got a decent chance of going to the World Cup and then this happens.
"Having been in the same position of injuring my Achilles it's tough to take.
"I did it last year - obviously not on the same stage he was at but I was pushing for a place in the play-offs.
"You feel robbed of the chance. It's a really painful injury but I'm sure he's got the best medical people looking after him."