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Rome Masters success At the Rome Masters in 2007 Volandri , having entered as a wild card , recorded the biggest win of his career by dispatching world number one Roger Federer in straight sets 6 – 2 , 6 – 4 .
 Volandri, Roger Federer
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Volandri, Roger Federer