text: in a year there are how many grand slams and which ones?   there are only 4 'grandslam' tournaments: 1. australia open, the 'opening' grand slam tournament, 2. roland garros, or the french open, 3. wimbledon, the all famous grass courts, 4. us open, as the 'closing' grandslam tournament.  there was an effort to add 1 major tournament, the atp masters cup, as the fifth but it had never succeed. the masters giving away the biggest prize money and only the 8 top-ranked players invited to play in round-robin matches.  all those grandslam categorized tournaments are for the professional players whilst there are some tournaments previously only for the amateurs i.e davis cup, federation cup or the olympic. at this time pro players play in those tournaments as well.