GRAND SLAM TICKETS – The four Grand Slams tournaments, also called "Majors" or "Slams", are the most important annual tennis events. They offer the most ranking points and prize money, the greatest strength and size of field, and have the highest attendance. The Grand Slam itinerary starts with the Australian Open in January, followed by the French Open in May-June, Wimbledon in June-July, and the US Open in August-September. The Australian and US tournaments are played on hard courts, the French on clay, and Wimbledon on grass. Grand Slam refers to winning the four majors in a single calendar year.