SAO PAULO -- The next two weeks are significant for Polish MMA .
Piotr Hallmann wants to do his part to represent his country in a positive light when he meets Alex Oliveira on Saturday at UFC Fight Night 77 .
SAO PAULO -- The next two weeks are significant for Polish MMA , and Piotr Hallmann wants to do his part to represent his country in a positive light when he meets Alex Oliveira on Saturday at UFC Fight Night 77 .