148977
Daniel Nestor and Nenad Zimonjić were the defending champions , but lost in the semifinals to Mahesh Bhupathi and Mark Knowles .
 Daniel Nestor, Nenad Zimonjić, Mahesh Bhupathi, Mark Knowles
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Daniel Nestor, Nenad Zimonjić, Mahesh Bhupathi, Mark Knowles