Lions back-rower Jamie Heaslip is tipping NSW coach Michael Cheika will have the Waratahs pumped up for tonight's showdown with the unbeaten tourists.
Heaslip knows the Waratahs coach from his days playing - and winning - under Cheika for Irish club side Leinster.
Cheika's arrival at Leinster in 2005 coincided with Heaslip joining the side, and the Lions star credits the Australian for transforming the club into a European Cup-winning team.
"The club had lost its way a little bit and was a little bit shaky," Heaslip said ahead of tonight's match in Sydney. "They were training all over the place. It was all over the place and Cheiks came in and he just put a really, really good structure and made it like - I always refer it to - an organisation, like in the NFL."
But if Cheika added a professional edge to Leinster off the field, Heaslip said he insisted every player showed mongrel on it.