Theoretically what is the minimum number of shots with which a lawn tennis player can win a set in a match?

The previous post is incorrect, the minimum would be 1 shot. Why? because both players could in theory double fault every game to get to a tie break. Both players would than continue to double fault until 5-6. Than the person who serves first would be 5-6 down. The other person would than have to get an ace or service winner to win the set with only one shot going in!