It's almost as if you didn't read my post.
A) Tennis players aren't world class sprinters. It takes them more space to achieve maximum speed.
B) Take note of how much space a sprinter needs to slow down after crossing the finish.
C) Put a tennis racquet in a sprinter's hands and it takes that much longer to achieve max speed.
A) I think it's a big assumption to say that an average tennis player can continue to speed up over distance like a world class sprinter. I could be wrong, but I don't think I would gain much if any speed once I reach stride. This is of course right now, with tennis being my main sprint training.
B) Not relevant. I brake hard on a tennis court because I have to. I also don't wear track shoes, because my ankles would snap running the way you have to on a tennis court.
C) Actually they wouldn't achieve the same max speed, so I'm not sure what the time to max speed with a racquet would be, but I think it could be less.
In any case, I don't know if this is a max speed issue or not, I think it's a have you ever been running as fast as you could go on a tennis court. I know I have. How close it was to my max speed, I don't know, but I have reached full stride before. It is indeed very rare though for me. I know some of the older guys I play with have certainly reached full speed. They just don't run that fast. So, can you ever be fast enough on a tennis court? My answer is no. It always pays off to be faster, even if you are so fast that you can only reach half speed.