7. Bibliography:
ActiveSG (2020). Differences between tennis courts Retrieved January 16, 2021, from https://www.myactivesg.com/Sports/Tennis/How-To-Play/Tennis-Facts/
Differences-between-tennis-courts
APT, (2012). Types of Tennis Courts:
Retrieved January 16, 2021,
from https://sportsbyapt.com/types-tennis-courts/#:~:text=Tennis%20has%20a%20
long%20history,offers%20unique%20challenges%20to%20players
Fred Watkins (2011). Science Project The height of a balls bounce on six different surfaces:
Retrieved January 16, 2021,
from https://www.youtube.com/watch?v=b1FTzuywf10
PubMed (2003). Bounce of a tennis ball:
Retrieved January 16, 2021, from
https://www.researchgate.net/publication/10713473_Bounce_of_a_tennis_ball
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