which surface was used the most according to this chart?
clay
col : no. | date | tournament | surface | partnering | opponent in the final | score row 1 : 1. | september 13, 2010 | ecuador f2 | hard | roberto quiroz | peter aarts\n christopher racz | 6–4, 6–4 row 2 : 2. | april 4, 2011 | chile f2 | clay | sergio galdós | guillermo hormazábal\n rodrigo pé | 5–7, 7–6(5), [10–5] row 3 : 3. | april 11, 2011 | chile f3 | clay | roberto quiroz | luis david martínez\n miguel ángel reyes | 6–4, 7–5 row 4 : 4. | august 8, 2011 | peru f1 | clay | sergio galdós | martín cuevas\n guido pella | 6–4, 6–0 row 5 : 5. | august 5, 2012 | manta | hard | renzo olivo | víctor estrella\n joão souza | 6–3, 6–0 row 6 : 6. | august 20, 2012 | colombia f2 | clay | ariel behar | nicolas barrientos\n michael quintero | 2-1 ret. row 7 : 7. | august 26, 2012 | ecuador f3 | clay | sergio galdós | mauricio echazú\n guillermo rivera- | 6-2, 6-1 row 8 : 8. | october 8, 2012 | chile f8 | clay | gustavo sterin | cristóbal saavedra-corvalán\n gu | 6-4, 7-5 row 9 : 9. | may 13, 2013 | argentina f6 | clay | sergio galdós | franco agamenone\n jose angel carrizo | 4-6, 6-4, [10–1] row 10 : 10. | may 27, 2013 | argentina f8 | clay | sergio galdós | daniel dutra da silva\n pablo galdón | 6-0, 7-5
which surface was used the most according to this chart?
No. Date Tournament Surface Partnering Opponent in the final Score
1. September 13, 2010 Ecuador F2 Hard Roberto Quiroz Peter Aarts\n Christopher Racz 6–4, 6–4
2. April 4, 2011 Chile F2 Clay Sergio Galdós Guillermo Hormazábal\n Rodrigo Pérez 5–7, 7–6(5), [10–5]
3. April 11, 2011 Chile F3 Clay Roberto Quiroz Luis David Martínez\n Miguel Ángel Reyes-Varela 6–4, 7–5
4. August 8, 2011 Peru F1 Clay Sergio Galdós Martín Cuevas\n Guido Pella 6–4, 6–0
5. August 5, 2012 Manta Hard Renzo Olivo Víctor Estrella\n João Souza 6–3, 6–0
6. August 20, 2012 Colombia F2 Clay Ariel Behar Nicolas Barrientos\n Michael Quintero 2-1 Ret.
7. August 26, 2012 Ecuador F3 Clay Sergio Galdós Mauricio Echazú\n Guillermo Rivera-Aránguiz 6-2, 6-1
8. October 8, 2012 Chile F8 Clay Gustavo Sterin Cristóbal Saavedra-Corvalán\n Guillermo Rivera-Aránguiz 6-4, 7-5
9. May 13, 2013 Argentina F6 Clay Sergio Galdós Franco Agamenone\n Jose Angel Carrizo 4-6, 6-4, [10–1]
10. May 27, 2013 Argentina F8 Clay Sergio Galdós Daniel Dutra da Silva\n Pablo Galdón 6-0, 7-5
Clay