SLAM HISTORYATP Grand Prix Tennis circuit
When the Open Era began in 1968, tennis tournaments started as a part of the newly created professional tours - a series of events for the best male tennis players to compete with each other. The most successful was the Grand Prix, which eventually integrated all the rival circuits. The Grand Prix of the tennis circuit tournaments were held from 1970 to 1989, and later they transformed into the ATP Tour. The list of the Grand Prix tournaments still needs to be completed, and we are doing our best to make it as complete as possible.