LOL... Yoda's saber form requires a lot of energy and he's 900 year's old, of course he's going to pant. Did we ever see him slow down? No . If you read correctly this is a triple threat match not a 2 on 1. In the triple threat Yoda would win because he is above Windu and Dooku in both the force and saber mastery.
Okaaay...
I've addressed this before. The reason Yoda is 'panting like a monkey' and Dooku is not is their Forms. Makashi requires little energy, Ataru requires a ton. Therefore, when the fight is done, Yoda would probably be a tad tired, no?
Doesn't mean he's worse than Dooku, though, or that Dooku will wear him out faster. It just means that he's going to be tired once he stops fighting.
Anyways, I say Yoda walks out of this.