Don't marry a tennis player. For love means nothing to them. No man should marry until he has studied anatomy and dissected at least one woman. All marriages are happy - it's the living together afterward that causes all the problems. The only place where divorce comes before marriage.
Married life is very frustrating.
In the first year of marriage, the man speaks and the wife listens. In the second year, the woman speaks and the husband listens. In the third year, they both speak and the neighbors listen. I think, therefore I am single. Only two things are necessary to keep one's wife happy.