What's the difference between tournaments, masters and open tournaments?

Before the era of tennis open, top professional tennis players and amateurs were strictly separated. They sign contracts with sponsors as if they owned a "company". Professional tours organized by employers provide generous bonuses. WCT and NTL, two big companies with top players, usually don't allow their players to play outside the system. Instead of signing players (amateurs), they usually participate in various competitions (competitions) and various Champions League (tournaments, US Open, Wimbledon, France). With the development of time, more and more former professional players hope to expand their influence from the "unit" and have top players in various events. 1On May 27th, 968, the French Open was renamed as the French Open (Roland Galos) from Ligue 1, and the French Open accepted professional players, thus opening the era of tennis open.

Of course, the WCT and NTL mentioned above will not be satisfied. 1968, WCT banned domestic players from participating in the French Open. 1970 These two groups boycotted the French Open. WCT and NTL merged, and 1970 organized a grand prix system, with various professional events (the Australian Open seems to be in this system) and another big organization, the International Lawn Tennis Federation (ILTF, now ITF), including the French Open, Wimbledon and the US Open against WCT. The two giants confront each other, and the rights and interests of players cannot be guaranteed. So in 1972, some players organized and established ATP, tennis professional association, trying to protect the interests of players. After that, several major organizations faced, resisted, compromised and cooperated, and finally formed the current men's professional tennis system: four Grand Slams (Grand Slams) +ATP World Tour (ATP World Tour) held a Grand Slam. It is difficult to find venues in Melbourne. The facilities were opened for the first time in Australia1905 65438+1October (Plexicushion), French Open red soil in Paris18965438+June-July 0, London venue 65438+August 0877-65438+September 0, new york.