Roberts will miss the tour but reckons Wales can roar.
Jamie Roberts reckons Wales have a golden opportunity to clinch a southern hemisphere scalp in this summer's tour of Australia. .
Wales travel Down Under without Roberts but he believes the team can build on their tremendous year, which culminated in the RBS 6 Nations Grand Slam, by walloping the Wallabies.
"They've got an incredible chance down south in Australia this year," said Roberts. "I don't think there's been a better opportunity for us to go and claim a southern hemisphere scalp.
"The team are obviously on a high from playing a good brand of rugby. All the boys are very comfortable with each other and we are all used to what we are doing.
"The shape of the team is good and the majority of players look to be fit. Hopefully we can send a more or less full strength side down there. It will be exciting."
The Blues star will miss out thanks to a reoccurrence of a knee injury sustained back in March.
Ashley Beck and Twickenham Triple Crown hero Scott Williams are the front-runners to fill the midfield void when Rob Howley leads Wales 'Down Under'
And like in the Six Nations Roberts admits he may have a battle on his hands to get back into the Welsh side.
"There's a lot of competition for places in the centre," added the Cardiff Blues star. "Obviously Jon and myself have played there for the last couple of years.
"But Scott has proved himself this season. The job he did down at Twickenham was fantastic and he's been playing well domestically.
"Ashley Beck is another who has been playing well for the Ospreys and deserves his chance. These guys could come in and stake a claim. That's the environment we are in.
"It's up to me then to put in the performances for the Blues when I do return and earn my place back in the team."
The 25-year-old underwent an operation at the beginning of April. He is already off crutches and can walk, but faces a long rehabilitation process and the added pain of watching Wales from the sidelines.
"I'm going really well. The graft is strong enough to allow me to walk and do my rehab. But I'm not going to be able to run for three months. The ligament doesn't heal to the bone for at least 12 weeks.
I suppose it's going to test my patience, but that's the way it is. It's massively frustrating. Any player will tell you it's a strange place to be watching the team from afar. It's obviously very hard to watch."
Wales U20 captain Tom Phillips and performance psychologist Dr Rich Neil explain why spending three days at Monmouth RFC has further strengthened the togetherness of the squad ahead of the #WorldRugbyU20s
Alongside Scarlets flanker James Davies and Cardiff Blues centre Cory Allen, three Wales Sevens core players have made the extended training squad for GB Sevens. Wales Head coach Gareth Williams tells WRU TV's Graeme Gillespie why Luke Treharne, Sam Cross and Luke Morgan earned selection in the initial training squad for Rio.
Wales Sevens head coach Gareth Williams tells WRU TV's Graeme Gillespie he has had to overcome a number of injuries before naming a competitive squad for this weekend's penultimate round of the World Series in Paris.
Merthyr were officially crowned champions of the SSE SWALEC Championship at Dowlais on Saturday where captain Andy Powell paid tribute to his side who have earned promotion to the Principality Premiership
Coleg y Cymoedd's season has had a spectacular ending with victory in two cup finals and a massive victory over one of the best rugby playing schools in the world - Welsh coach Warren Gatland's old alma mater, Hamilton Boys' High School.
WRU chief executive Martyn Phillips hosted the second meeting of the WRU Youth Board last weekend ahead of the Judgement Day IV regional double-header. Tthe board, made up of 15 under-21-year-olds from around Wales, heard presentations from head of participation Ryan Jones, policy and integrity manager Jeremy Rogers and national women's rugby manager Caroline Spanton, with Pro Rugby Wales CEO Mark Davies also on hand to hear the range of views aired.
Wales duo Rhun Williams and Liam Belcher, who makes a welcome return after five months of injury woe, look ahead to next month's World Rugby U20 Championship in Manchester where they will face Ireland, Georgia and New Zealand.