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KEY BISCAYNE, Fla. (AP) — Serena Williams won her eighth Key Biscayne title Saturday and remained unbeaten this year by drubbing Carla Suarez Navarro 6-2, 6-0 in the final of the Miami Open.

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Williams became the fourth woman to win the same WTA event at least eight times. Martina Navratilova won Chicago 12 times, the most titles by a woman at any tournament.

The top-ranked Williams claimed her second title this year. She won her 19th Grand Slam championship at the Australian Open in January, and has now won 12 consecutive finals.

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Williams improved to 18-0 this year. She withdrew before the Indian Wells semifinal last month with a knee injury but quickly recovered.

Williams is 73-7 at Key Biscayne, where she has won her past 18 matches.

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