I was reading this (or maybe it was posted in here) but Dooku was a higher level Jedi than Obi Wan overall. On the second fight with Anakin, Dooku supposedly was holding back at the order of Palpatine and by the time he realized the fix was in he was assed out.I always found it how easily Dooku defeated Obi Wan both times. Maybe you can argue the Jedi are like boxers and it depends on the matchups but I just think it was bad writing on Lucas' part. Dooku didn't even break a sweat sonning Obi Wan twice yet Anakin bodied Dooku in the second fight