Keys, who rose to world No. 7 after winning her first Grand Slam title, had entered the WTA 250-level ATX Open in Austin, Tex., which begins February 24. The American entered the tournament as world No. 21, with fellow American Jessica Pegula entering as world No. 6.

Due to an odd rule preventing more than top 10 player participating in a WTA 250 tournament, the ATX Open announced Tuesday that Keys will no longer be eligible to participate in the event. The Austin-based tournament already has No. 6 Jessica Pegula committed to play.

American tennis player Madison Keys’ had to pay a heavy cost for her maiden Australian Open title as she was forced to skip ATX Open due to bizarre WTA rule.In a statement, the ATX Open organisers said “As a 250-level tournament,