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She then beat Monica Niculescu in two sets to reach the fourth round , in which she upended Madison Keys in two sets to reach the quarterfinals and then beat unseeded Anastasija Sevastova to enter the semifinals .
 Monica Niculescu, Madison Keys, Anastasija Sevastova
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Monica Niculescu, Madison Keys, Anastasija Sevastova