The Toyota International Series [1] was a professional women's tennis circuit administered by the Women's Tennis Association that was founded in 1977 as the Colgate International Series [2] it consisted of tournaments absorbed from the ILTF Women's International Grand Prix and included all those worldwide events that were not part of the Virginia Slims Circuit who's tournaments were mainly in the United States.
[3] In 1981 the Toyota Motor Corporation took over sponsorship of the circuit from the Colgate-Palmolive Company where it resumed under its last title name until 1982.
In 1983 it was merged into a single women's premier global tour called Virginia Slims World Championship Series.
In 1990 the VS World Championships Series became known as the WTA World Tour, today known as the WTA Tour.
The main sponsors of this circuit included; Women's World Tennis circuit|1923]]