Fly-half: CAMILLE LOPEZ (France)
Scrum-half: MAXIME MACHENAUD (France)
The scrum-half and placekicker suffered ruptured knee ligaments in his side’s 39-15 win Top 14 win away to Bordeaux Begles last weekend.
Prop: ALASDAIR DICKINSON (Scotland)
Hooker: DYLAN HARTLEY (England)
The England skipper will also be absent this summer after being told to take the summer off following the Northampton hooker’s latest concussion. The 32-year-old England captain has not played since taking a blow to the head in their final Six Nations match against Ireland at Twickenham.
Prop: LEON BROWN (Wales)
The 21-year-old tight-head was ruled out of contention for the Six Nations after being sidelined for more than two months with the concussion he suffered against New Zealand in November. And now, after just four games back with his region, he is crocked again and facing a lengthy lay-off with ligament damage.