playing competitive doubles, everyone on the court is a righty, sets are 1-1, we`re up 5-4 and I`m serving for the match. For background, I have a big, flat first serve and a good twist 2nd serve that I sometimes hit a little harder as a first serve, especially wide to the ad court. Through the first two sets they are having a hard time returning my serve and I`m holding easily. Its hot, I`m a little tired, a little nervous, my serve velocity is down 10-15mph and in my last service game they pushed me to deuce. I dig deep, get my serve velocity back up and we get to 30-15. I hit a big overhead off of a deep lob to run it to 40-15. One of our opponents says `great way to end it`, not realizing its not over. I go to the service line thinking `An even better way to end it is an ace`. I hit a blast right up the T and miss by an inch. As soon as I miss it I`m thinking to myself, what a stupid, stupid idea to predicate my end of match strategy on a line our opponent tossed out. With that thought in mind I hit my kick serve into the middle of the net for my first double fault of the match. After the match, I started thinking about the correct serving strategy at 40-15. Anyone have an opinion on the right strategy?