Never let your opponent know you are worried. Never show fatigue
or pain if it is possible to avoid, since it will only give him
confidence. Remember that he feels just as bad as you, and any
sign of weakening on your part encourages him to go on. In other
words, keep your teeth always in the match.

Don't worry. Don't fuss. Luck evens up in the long run, and to
worry only upsets your own game without affecting your opponent.
A smile wins a lot of points because it gives the impression of
confidence on your part that shakes that of the other man. Fight
all the time. The harder the strain the harder you should fight,
but do it easily, happily, and enjoy it.

Match play, where both men are in the same class as tennis
players, resolves itself into a battle of wits and nerve. The man
who uses the first and retains the second is the ultimate victor.

I do not believe in a man who expects to go through a long
tournament, going "all out" for every match. Conserve your
strength and your finesse for the times you need them, and win
your other matches decisively, but not destructively. Why should
a great star discourage and dishearten a player several classes
below him by crushing him, as he no doubt could? A few games a
set, well earned, would be a big factor in encouraging that
rising player to play in tournaments, while it would in no way
injure the reputation of the star.

Never hurry your opponent by serving before he is fully set to
receive. This is a favourite trick of a few unscrupulous players,