I do admit Tennis is a game requiring physical endurance and technical competence, But I beg to differ if someone considers Tennis as the game that requires the above qualities the most , What about football? look at the National teams of Spain, Argentina and Brazil, See how the strikers/forwards in these teams move with lightening speed with the ball, converting any chance to a sure goal with his head or leg ! the inner sytrength, stamina, energy , vigour and the ability to surmount any kind of opposition once he is with the ball makes a good striker, The stamina ; speed and quick foot work applies equally well to the defenders also, So, like Football and other games, Tennis also requires good stamina to outperform the opponent,

Not only tennis, every sport to be mastered and become a celebrity in that one needs endurance, technical competence and above all perseverance.

YEs.