According to a number of sources, the testosterone-fuelled tension was running high between the show’s leading men throughout production of the entire season.
On-set crew members were overheard revealing this series was the "toughest shoot yet", with host Osher and Cummins "losing respect for each other, episode after episode."
While filming has now officially wrapped, the battle between the boys is far from over.
Osher and Nick are set to go head to head once again – this time in publishing.
Both stars are set to release high-profile books at exactly the same time, piggybacking on The Bachelor finale.
Osher’s new autobiography Back After The Break has already been announced, while Nick’s debut is rumoured to be a guide to love and romance.
While this is Nick’s first foray into publishing, he and his team are no amateurs.
Sources tell us he has a trump card up his sleeve to maximise publicity for the book.
To coincide with the launch, he’ll reportedly be walking the Kokoda Track, to be filmed and covered by Network Ten.