Tennis, like golf, comes down to Grand Slams, and the phrase "Grand Slam" has multiple meanings.
The first meaning of the phrase "Grand Slam" defines a major tennis tournament. There are four Grand Slam tournaments each year. They're commonly known as majors, and the first step to reaching legendary status is winning at least one of these Grand Slam tournaments. All legends do it.
The second step to reaching legendary status brings us to the next meaning of the phrase "Grand Slam," which is the act of winning all four Grand Slam tournaments in a career. Not all legends do it.
Players who have won the Australian Open, the French Open, Wimbledon and the U.S. Open have achieved a Grand Slam. The third meaning of the phrase, and the third step to reaching legendary status, is winning all four Grand Slam tournaments in a single season. Only six legends have done it. It gets harder to do every year, and the last time it happened was 1988.
If all those Grand Slams aren't enough, if you want to enter the most legendary of legendary statuses, you need to win the singles, doubles and mixed doubles titles at the Australian Open, the French Open, Wimbledon and the U.S. Open. Only three legends have done it. Only one has done it in the Open Era.
Can you identify the greatest tennis players to ever step on the court?