Heh.
She goes down to the arena opposite her opponent, and thinks - she knows he uses sound waves to disorient his enemies, so she needs to keep out of range of that amplifier gauntlet thing, or have him unable to reach it. Simple enough.
When the match starts, she jumps back, and flings a chakra chain at Dosu. He dodges, but the chain curves around behind him, looping to catch him from behind. He barely notices in time, jumping over the chain - which she then dismisses - before rushing at Mariko, gauntlet at the ready.
She ducks in then rolls to avoid him, just out of his range, slamming her open hand on the ground at he then closes, ink spiraling out from her fingers. A chakra pulse, and the ground heaves, exploding. She curls in on herself, closes her eyes and plugs her ears with chakra, and projects a thick chakra shield from her feet, mostly shielding her from the blast, but still sending her flying. She lets herself sail, then flips at the last second to land on a wall and look for her opponent.
He's gone flying too, skidding across the ground, clearly disoriented. Mariko lashes at him with a chakra chain from either side, successfully wrapping around him, and then yanks him towards her, launching herself at him in the same motion. Her fist collides with his jaw, then her knee with his stomach. He stumbles, recovers, and she body flickers behind him. A brief moment of disorientation, but she recovers first, lashing out to slam a kunai hilt into the base of his neck. He collapses, unconscious.