The tennis matches at Wimbledon are played on grass courts, which makes them unusual and special. Professional tennis players will practise for many hours each day, perfecting a shot and building up mental and physical fitness. Inspite of this, they sometimes have off days too for a variety of reasons. There are a large number of famous quotes from from players past and present. Arthur Ashe, who played for the USA said
'Regardless of how you feel inside, always try to look a winner'
You could look up some more sayings and see if you agree with them.