BBC SPORT | Tennis | Rules and Equipment | Serve basics: foot faults
What Is A Foot Fault In Tennis?
Bianca Andreescu beats Liudmila Samsonova San Diego Open first round - TSN.ca
Foot fault! John McEnroe coaches Milos Raonic - Picture of The All England Lawn Tennis Club, London - Tripadvisor
What's the Call? Can the server cross the center line?
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BBC Sport Academy | Tennis | Rules | The serve | The serve