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Serena Williams slugged her way to a sixth Wimbledon singles title Saturday morning, completing her second so-called “Serena Slam” and positioning herself for tennis history.

The 33-year-old American defeated Garbine Muguruza of Spain, 6-4, 6-4, to win her fourth consecutive Grand Slam tournament, beginning with last year’s U.S. Open and including this year’s Australian and French open titles. She accomplished a similar sweep in 2002-2003.

Serena Williams celebrates after winning the women's singles final at Wimbledon,in London on July 11.Kirsty Wigglesworth / AP

The Wimbledon win is also Williams' 21st Grand Slam title.

She is now poised to equal some of the greatest marks in tennis six weeks from now at the U.S. Open in New York:

  • A calendar-year sweep of the major tournaments has only been accomplished three times and not since Steffi Graf did it in 1988.
  • Williams can also match Graf’s Open-era record of 22 Grand Slam singles titles.
  • A seventh title would break a tie with Chris Evert for most U.S. Open wins.

The U.S. Open begins Aug. 31 in Flushing Meadows, New York.

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