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He has won one singles title ( Stuttgart in 2009 ) , reached the quarter-finals of the 2013 Australian Open and achieved a career-high singles ranking of World No. 25 in January 2013 .
 location: Stuttgart
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Stuttgart