Tennis International - ATP World Tour

Tennis has come a long way since "Open Tennis" began in 1968 and the ATP's been part of the storied history. The Grand Slam tournaments and all other national championships were open to amateur competitors only prior to 1968.
Two years later tournaments around the world formed a unified circuit, which became the Grand Prix. In 1972, the leading professionals joined forces to create the Association of Tennis Professionals.
...
2010: During the season two major sponsors were announced with the signing of Corona Extra as a premier partner, and FedEx as a platinum partner.