WTA 1000 tournaments
The WTA 1000 tournaments are a category of tennis tournaments on the WTA Tour, governed by the Women's Tennis Association. The old WTA Premier Mandatory and Premier 5 tournaments merged into a single highest tier implemented in the 2021 schedule reorganization. Until 2024, only four of the nine WTA 1000 tournaments were mandatory, when the category expanded to ten mandatory tournaments.
Source: Wikipedia
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