It doesn't have a name. There is a thing called the grand slam which is winning Wimbledon, French open, Australian open and the US open in a single year.
Tennis rackets used on tour, by the professional players
Science Major: Association of Tennis Professionals
The tournament today is known as Association of Tennis Professionals. The National Tennis League was a tour for professional male tennis players.
The WTA Tour
Explain why it would cost Andre Agassi more to leave the professional tennis tour and open a tennis shop than it would for the coach of a university tennis team to do so.
A 30-year-old can still be a professional, but if you want to be on the ATP world tour and travel to tournaments around the world, it is not likely. Just being a professional is very achievable, though.
WTA Tour Tennis happened in 2001.
International Tennis Tour happened in 1993.
It is the Association of Tennis Professionals, responsible for the mens tour and world rankings of male tennis players.
ATP World Tour
WTA Tour Tennis was created on 2001-09-27.
International Tennis Tour was created on 1993-03-26.