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' '' Jürgen Melzer '' ' / ' '' Philipp Petzschner '' ' defeated Mariusz Fyrstenberg / Marcin Matkowski , 6–2 , 6–2
 Jürgen Melzer, Philipp Petzschner, Mariusz Fyrstenberg, Marcin Matkowski
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Jürgen Melzer, Philipp Petzschner, Mariusz Fyrstenberg, Marcin Matkowski