A fiery Australian tennis player, whose commitment to the sport is sometimes called into question is a description that could easily be applied to either Bernard Tomic or Nick Kyrgios, but Tomic's girlfriend Emma Blake-Hahnel disagrees.

"They are completely different people with different personalities and they have their own way about going about things, you can't really compare them. It's like comparing apples with pears," Blake-Hahnel told Fairfax Media from Melbourne's VIP-filled Virgin AFL Grand Final Party.

Just last week, Kyrgios, 22, current world number 20, said it was unfair to lump him in with Tomic, 24, a one-time world number 17 who has now fallen to 146, saying he had "lost his way".

But defending her boyfriend of two years, Blake-Hahnel said: "He very much has it all together."