Story highlights Serena Williams to defend her French Open in Paris

The year's second grand slam begins Sunday

(CNN) She's the woman everyone is trying to beat, but Serena Williams insists she is "ready for anyone" as she prepares to defend her French Open crown.

The world No. 1 triumphed in Paris last year as part of a run which has seen her win four of the last six grand slams, and despite suffering a shock defeat to Angelique Kerber at the Australian Open she is the strong favorite as the tennis world heads to Roland Garros.

"You do want to play the No. 1 -- you do want to beat them," the 21-time grand slam champion told CNN's Open Court. "I know I did -- but I am ready for that. I am ready for anyone every time."

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