100% is really hard for matchplay. I would try and hit 70% as much as possible. You should be able to get a lot of pace with just 70%, and it will give you more control.
If you come out and hit that hard, you give away the match. I'd just slice you and save my energy and watch the UE's pile up personally.
If you are timing the ball right, you will be cracking the ball pretty hard and staying in that 70-80% range. Your UE's will also go down as well.