For example, fed is a way better player than del potro, and he still got smacked. If the best player ever can't stop it, why can you? Look all im saying is, when someones hot...you can't do much. I can guarantee you, in his mind, you were no threat, you were a standing target. Have you ever been in the zone? i'm sure everyone has been, you dont even consider the opponent on the other side of the court, you couldn't care less about how long hes taking between points, all you see is the ball, and all the opponent feels is pain. Like I said, all that change tactics bring him to net blah blah blah, falls under the same category, WEATHERING THE STORM. Your reacting to his hitting, you have NO choice but to change tactics if you want to be competitive. Because I'm sure when the storm is over you will revert to your comfortable playing style and hopefully pull it out.
Also mixing life with tennis is not nearly the same. In life we can make choices that lead to better or worse options. In tennis, we are reacting as said above, you wouldn't change tactics if you were winning, your only doing so because hes smacking you around. We have a limited amount of choices, Lob, topspin, slice, flat, Cross court, DTL, down the middle, (dink is considered a flat ball, a very slowly hit one...) Remember, I'm just going by your choice of words, big hitting--consistently. If i'm hitting 70mph groundstrokes and their not missing, sorry, your not going to be doing nothing except trying to truck them down, you can accept this now as the game of tennis (im sure the recieving end of sampras serve in his prime wanted to believe they can do something...) or you can try to deny what this game is about, percentages. Of course no one can play 100% for the entire match, so once again, weather the storm, dont lose your focus. you should be able to pull it out.
Don't misinterpret this, i'm not trying to put you down, but how many pros and teaching pros have said, he was better today, he got hot, I couldn't do anything...Feel me bro?