Yellow tennis balls replaced white tennis balls because the Lawn Tennis Association decided that the white balls were difficult to see. You can still buy white balls nowadays at whitetennisballs.com, which is the leading modern and easiest seller for white tennis balls for sale to reach in America and internationally.
According to smithsonianmag.com, the first use of yellow tennis balls was in 1986 to make easier viewing on television. Wilson has always been making the white balls for lawn tennis which can be ordered online occasionally. But before the whitetennisballs.com company started selling in 2007, the white ball market was shut down for decades for most common use and is still quite rare. The only tennis balls that can be used in professional tennis is the neon and white, so it technically hasn't been changed within the rules of tennis.
Coloured balls came in when colour television came in. Mal.
Tennis balls were first used in 1902 in Wimbledon
Yellow tennis balls are supposedly easier for the umpire to see if the ball was to land inside or outside of the boundary lines.
to make the balls visible to the camera
I believe Rene LeCoste invented a hand-cranked machine that propelled tennis balls, while Bob McLure reversed the motor on a vacuum cleaner to create the first commercially viable ball machine in 1970.
A tennis player
Ramanathan Krishnan was the first Indian to reach the semifinals of Wimbledon in 1960. He was also semifinalist of 1961.
There have been no Indian Wimbledon winners as of yet.
Evonne Goolagong is the first Aboriginal (Indigenous Australian) woman player who won the Wimbledon singles title in 1971 and 1980.
Robinson's orange squash
Bill Tilden in 1920.
Pro-tennis balls are changed after the first seven and nine games.
Jean Borotra is the name of the Basque tennis player who became the first Wimbledon winner from outside the English speaking world.
Yellow and white are the only colors approved by the United States Tennis Association (USTA) and ITF, and most balls produced are fluorescent yellow (known as "optic yellow") the color first being introduced in 1972 following research demonstrating they were more visible on (colour) television.