361957
Seeds Rubén Ramírez Hidalgo ( First Round , retired due to general exhaustion ) Daniel Muñoz de la Nava ( Second Round ) Matteo Viola ( First Round , retired due to a low back injury ) Flavio Cipolla ( Second Round ) Draw Finals Top Half Bottom Half References
 Rubén Ramírez Hidalgo, Daniel Muñoz de la Nava, Matteo Viola, Flavio Cipolla
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Rubén Ramírez Hidalgo, Daniel Muñoz de la Nava, Matteo Viola, Flavio Cipolla