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She stunned Navratilova in the fourth round 6 – 4 , 0 – 6 , 6 – 3 while Navratilova 's coaches ( Renee Richards and Nancy Lieberman ) argued in the stands over strategy , something Navratilova noticed during the match .
 Navratilova, Navratilova, Navratilova
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Navratilova, Navratilova, Navratilova