'You're a proper (sic), you couldn't knock the fluff of a cappuccino,’ said one person.
Another said: 'It appears that Ivan is King ding-a-ling,' and 'You muppet.'
'It's always the loudest ones in the room that are weak as p*** and he has definitely proved that,' said one Instagram user.
Nic broke his silence following Monday's showdown.
'Ivan's just a protective brother... There's nothing wrong with that,’ he told 9Honey.
'And it's good to see. It's him being a really good older brother. And yeah, I respect that. And I respect their family so much,' he added.