6980
In a break from tradition , the Open did not seed in strict accordance with ATP rankings , instead taking into account other factors that raised objections of favourtism toward U.S. players .
 ATP, U.S., Open
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 ATP, U.S., Open