19008
He defeated Viktor Troicki , Jürgen Melzer , and Igor Andreev in early rounds , then 2007 finalist Mardy Fish in the final .
 Viktor Troicki, Jürgen Melzer, Igor Andreev, Mardy Fish
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Viktor Troicki, Jürgen Melzer, Igor Andreev, Mardy Fish