This is almost hilariously one-sided. The only area Pre Vizsla might stand a chance is in H2H, and even then I doubt it. Considering how effective Dooku's H2H was against Obi-Wan and Anakin simultaneously, I doubt Pre Vizsla can actually pressure Dooku whatsoever.
Not at all. Pre Vizsla couldn't even contend with early TCW Kenobi when going all out using his suit's features. Hell, we know Vizsla lost to Dooku in TCW off-screen, since Vizsla had a lightsaber scar on his face which he attributed to a "parting gift from Count Dooku."
Canonically, yes, they have actually fought. Both in Legends and Canon. However, we never get to see the fight take place. We just know Pre Viszla failed to kill Dooku, and was left with a scar on his face, indicating he lost.