Billy Vunipola has revealed that his decision to swap Wasps for Saracens was largely down to a desire not to face off against his brother.
The younger brother of Saracens prop Mako Vunipola, the number eight ruffled some feathers at Wasps when he decided to switch London clubs, despite having gained international honours while with Dai Young's team.
However, Vunipola says that had such difficulty playing against his brother that he decided to join him at Saracens.
"It was awkward," he told the Evening Standard. "There were a few times when I held back from tackling Mako. I never want to be in that position again, it was really weird.
"It was even worse for our families watching. They didn't know who to support."
Mako Vunipola says that even in training it's difficult to come up against his sibling.
"We both give 100 per cent all the time but even now it's awkward," he explained. "In training here, for example, if I tackle him we both just go straight down - it's not full-on. It's not a fear of injuring each other, it's just because we are brothers."