In 1989 the
ITF Grand Prix Circuit and
WCT Circuit were both discontinued it's tournaments were absorbed into the new ATP Tour in 1990. The new tour was made up of three global series (tiers) of tournaments, the
ATP Championship Series (Single Week), the ATP Championship Series this tier and the
ATP World Series. The nine most prestigious
Grand Prix Super Series tournaments became the Championship Series Single Week events, nine other super series, and one regular series event together with two new tournaments formed the first Championship Series tier group. Between 1990 and 1999 a total of twenty one tournaments had been granted ATP championship series status, though usually twelve or eleven events comprised the tier in any particular given season. In 2000 it was renamed the ATP International Series Gold. ==Tournaments==