# Duilio Beretta

Duilio Beretta Avalos (Spanish pronunciation:; born February 25, 1992) is a Peruvian professional tennis player.
He won the finals stage of Boys' Doubles events on the French Open and US Open with Ecuadorian tennis player Roberto Quiroz in 2010. They defeated Argentinian pair Facundo Argüello and Agustín Velotti in France and won against Oliver Golding and Jiří Veselý in the United States.

## ATP Challenger and ITF Futures finals
### Singles: 8 (2–6)

* Legend (singles)
* ATP Challenger Tour (0–0)
* ITF Futures Tour (2–6)
* Finals by surface
* Hard (0–0)
* Clay (2–6)
* Grass (0–0)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | Apr 2011 | Chile F2 | Futures | Clay | Guillaume Rufin | 2–6, 2–6 |
| Loss | 0–2 | May 2011 | Venezuela F3 | Futures | Clay | David Souto | 2–6, 3–6 |
| Win | 1–2 | May 2011 | Paraguay F2 | Futures | Clay | Marco Trungelliti | 4–6, 7–6$^{(7–2)}$, 6–3 |
| Loss | 1–3 | Jun 2011 | Argentine F8 | Futures | Clay | Facundo Argüello | 6–3, 2–6, 6–7$^{(4–7)}$ |
| Loss | 1–4 | Aug 2011 | Peru F1 | Futures | Clay | Maximiliano Estévez | 6–7$^{(2–7)}$, 6–7$^{(3–7)}$ |
| Loss | 1–5 | Aug 2011 | Peru F3 | Futures | Clay | Agustín Velotti | 2–6, 4–6 |
| Loss | 1–6 | Jun 2012 | Peru F1 | Futures | Clay | Renzo Olivo | 5–7, 6–3, 1–6 |
| Win | 2–6 | Jun 2012 | Peru F6 | Futures | Clay | Jorge Aguilar | 5–7, 6–3, 7–5 |

### Doubles: 26 (18–8)

* Legend (doubles)
* ATP Challenger Tour (1–2)
* ITF Futures Tour (17–6)
* Finals by surface
* Hard (2–1)
* Clay (16–7)
* Grass (0–0)
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Loss | 0–1 | Nov 2009 | Chile F5, Santiago | Futures | Clay | Sergio Galdós | Federico Zeballos | 4–6, 4–6 |
| Win | 1–1 | Sep 2010 | Ecuador F2, Guayaquil | Futures | Hard | Roberto Quiroz | Christopher Racz | 6–4, 6–4 |
| Win | 2–1 | Apr 2011 | Chile F2, Santiago | Futures | Clay | Sergio Galdós | Guillermo Hormazábal | Rodrigo Pérez | 5–7, 7–6$^{(7–5)}$, [10–5] |
| Win | 3–1 | Apr 2011 | Chile F3, Santiago | Futures | Clay | Roberto Quiroz | Luis David Martínez | Miguel Ángel Reyes-Varela | 6–4, 7–5 |
| Win | 4–1 | Aug 2011 | Peru F1, Arequipa | Futures | Clay | Sergio Galdós | Martín Cuevas | Guido Pella | 6–4, 6–0 |
| Loss | 4–2 | May 2012 | Peru F1, Chosica | Futures | Clay | Sergio Galdós | Marcelo Demoliner | Renzo Olivo | 3–6, 6–7$^{(8–10)}$ |
| Loss | 4–3 | Jul 2012 | Peru F6, Lima | Futures | Clay | Sergio Galdós | Marcelo Demoliner | Renzo Olivo | 4–6, 3–6 |
| Win | 5–3 | Aug 2012 | Manta, Ecuador | Challenger | Hard | Renzo Olivo | Víctor Estrella João Souza | 6–3, 6–0 |
| Win | 6–3 | Aug 2012 | Colombia F2, Medellín | Futures | Clay | Ariel Behar | Nicolás Barrientos | Michael Quintero | 2–1 ret. |
| Win | 7–3 | Sep 2012 | Ecuador F3, Quito | Futures | Clay | Sergio Galdós | Mauricio Echazú | Guillermo Rivera Aránguiz | 6–2, 6–1 |
| Win | 8–3 | Oct 2012 | Chile F8, Coquimbo | Futures | Clay | Gustavo Sterin | Cristóbal Saavedra Corvalán | Guillermo Rivera Aránguiz | 6–4, 7–5 |
| Loss | 8–4 | May 2013 | Argentina F4, Calamuchita | Futures | Clay | Sergio Galdós | Mauricio Perez Mota | 1–6, 1–6 |
| Win | 9–4 | May 2013 | Argentina F6, Río Cuarto | Futures | Clay | Sergio Galdós | Franco Agamenone | Jose Angel Carrizo | 4–6, 6–4, [10–1] |
| Loss | 9–5 | May 2013 | Argentina F7, Bell Ville | Futures | Clay | Sergio Galdós | Andrea Collarini | Guillermo Durán | 3–6, 4–6 |
| Win | 10–5 | Jun 2013 | Argentina F8, Arroyito | Futures | Clay | Sergio Galdós | Daniel Dutra da Silva | Pablo Galdón | 6–0, 7–5 |
| Win | 11–5 | Aug 2013 | Ecuador F1, Guayaquil | Futures | Clay | Roberto Quiroz | Rodrigo Sánchez | 6–1, 6–3 |
| Loss | 11–6 | Aug 2013 | Ecuador F2, Guayaquil | Futures | Hard | Nicolas Alvarez | Emilio Gómez | Roberto Quiroz | 1–6, 4–6 |
| Win | 12–6 | Oct 2013 | Peru F1, Arequipa | Futures | Clay | Rodrigo Sánchez | Mauricio Echazú | Iván Endara | 6–2, 6–4 |
| Win | 13–6 | Oct 2013 | Peru F2, Lima | Futures | Clay | Rodrigo Sánchez | Mauricio Echazú | Cristóbal Saavedra Corvalán | 6–3, 5–7, [10–2] |
| Loss | 13–7 | Sep 2014 | Quito, Ecuador | Challenger | Clay | Martín Cuevas | Marcelo Demoliner João Souza | 4–6, 4–6 |
| Win | 14–7 | Dec 2014 | Dominican Republic F2 | Futures | Clay | Hugo Dellien | Fabiano de Paula | Thiago Monteiro | 3–6, 6–4, [10–8] |
| Win | 15–7 | Dec 2014 | Dominican Republic F3 | Futures | Clay | Hugo Dellien | Emilio Gómez | Manuel Sánchez | 6–7$^{(9–11)}$, 6–4, [10–4] |
| Win | 16–7 | Apr 2015 | Chile F4, Santiago | Futures | Clay | Jorge Aguilar | André Miele | Alexandre Tsuchiya | 6–1, 6–4 |
| Win | 17–7 | Apr 2015 | Chile F5, Santiago | Futures | Clay | Jorge Aguilar | Juan Pablo Ficovich | Mariano Kestelboim | 6–2, 6–2 |
| Loss | 17–8 | Sep 2015 | Barranquilla, Colombia | Challenger | Clay | Mauricio Echazú | Marcelo Arévalo Sergio Galdós | 1–6, 4–6 |
| Win | 18–8 | Dec 2015 | Peru F6, Trujillo | Futures | Clay | Andrea Collarini | Alexander Merino | Jaume Pla Malfeito | 6–4, 6–3 |

## Junior Grand Slam finals
### Doubles: 2 (2 titles)

| Result | Year | Tournament | Surface | Partner | Opponents | Score |
| Win | 2010 | French Open | Clay | Roberto Quiroz | Facundo Argüello Agustín Velotti | 6–3, 6–2 |
| Win | 2010 | US Open | Hard | Roberto Quiroz | Oliver Golding Jiří Veselý | 6–1, 7–5 |

## Evolution in the ATP ranking (singles)

Changes in the ranking ATP to the end of the season.
| Year | 2008 | 2009 | 2010 | 2011 | 2012 |
| Singles ranking | 1480 | 943 | 811 | 392 | 394 |

## Evolution in the ATP ranking (doubles)

Changes in the ranking ATP to the end of the season.
| Year | 2009 | 2010 | 2011 | 2012 |
| Doubles ranking | 1256 | 944 | 473 | 240 |