From actual polo on horses, to golf tournaments and Venus Williams and what I refer to as a “polo" shirt is actually and originally derived from early tennis stars. They wore this type of shirt while playing at major tennis matches. Rene Lacoste, an early tennis star was the innovator when it comes to the tennis shirt. He disliked the clothes he was wearing while on his way to winning 7 grand slam championships invented the Tennis Shirt.
The original fabric he used was a cotton pique fabric that was knitted instead of woven. The reason for that was to be able to have the player move more easily and was a more breathable fabric. The term tennis tail was coined due to the fact he left the fabric longer in the back than in the front. While the cotton pique is still the most popular fabric for making polo shirts there have been advancements in the technology of the fabrics being used for polo shirts of today.
Today tennis shirts are worn in all types of settings - not just at a tennis match, and as you guessed they are also referred to as golf shirts and polo shirts. Yes it is true that they are used in polo matches too. Polo Shirts are worn by many semi professional organizations, in non athletic contexts, and by retail workers in work settings. Polo Shirts are usually 100 % cotton but are being made with polyesters that wick away moisture, are breathable and keep the wearer dry. Professional golfers are know to wear golf polo's. See Some Polos .
Jason Duke Golf Polos USA