Panda, for you, your sons, and everyone who plays tennis, here are some tips that few people have ever heard, in my considerable experience. I have played tennis for forty years, and now play six days a week. I have a patent pending on a new way to string tennis rackets which increases string area by ~45 square inches forehand and ~45 square inches backhand nearest the frame.
y-stringrackets.blogspot.com
When playing the net, and you get lobbed, run to the right side (if you are right handed) every single time so you always are hitting a forehand back to your opponent(s). Your forehand will be stronger and hit back a lob to give you time to recover.
When receiving a critical point, not every point, take a step or two closer to the service line as if you are challenging your opponent. This will make him (her) put more juice into the serve and increase the chances of a fault. If they fault, take another step in to really get into their brain. Double fault - you win the critical point. If they put it in, you can return and close the net sooner!
Do you know what "NOT UP" means? Ball bounced twice on your side. Point is over.
What are Margaret Court Rules? In mixed doubles, women get two serves to men but men only get one serve to women, to even up chances of a rally.
Years ago, the 208th ranked male player beat both Williams sisters when they were at the top of their game. He said "I had to play down to the level of 600 or it wouldn't have been any fun."
And for this, women get equal pay as men do when men play 5 sets in the four Grand Slam events, while women play only three? This is grossly unfair, equal pay for very unequal work. And don't mention "draw" to me because work is NOT "draw." In 2022, an unranked woman won the U.S. Open and she had no draw because nobody knew her.