What is the colour of a standard tennis ball?
Tennis is generally played as either singles or doubles. How many people are on the playing surface during a game of doubles?
What is the name of Federer's foundation?
There are four main tennis tournaments each year. What are these collectively known as?
In baseball, a batter is out if the umpire calls?
How many times has Federer won the Wimbledon title?
What colour is a standard tennis ball?
What part of the body can go before the word "fault" to make the name of a real infringement encountered in tennis?
Where was Roger Federer born?
Who invented tennis?