# Daniel Vallejo

Adolfo Daniel Vallejo (born 28 April 2004) is a Paraguayan tennis player. Vallejo has a career-high ATP singles ranking of world No. 195 achieved on 3 March 2025. He is currently the No. 1 Paraguayan tennis player.
On the ITF Junior Circuit, Vallejo had a career-high junior ranking of No. 1, achieved in August 2022.

## Junior career

In 2021, he won the Junior Orange Bowl in Plantation, Florida, defeating Bruno Kuzuhara in the final. He was the first Paraguayan player to win the tournament and only the second to reach the final after Víctor Pecci.
In 2022, he reached the final of the Australian Open in boys doubles, partnering with Alex Michelsen, losing in the final to Bruno Kuzuhara and Coleman Wong.

## Professional career
### 2023: Maiden ATP Challenger doubles title

In July, he reached his first final on the Challenger Tour in Santa Fe, Argentina, losing to Mariano Navone in the final. The following month, he won his first Challenger doubles title in Lima, Peru, partnering with Gonzalo Bueno, defeating Jorge Panta and Ignacio Buse in the final.

### 2024: First singles ATP Challenger title, top 250

In March, he won his first Challenger title in São Léopoldo, Brazil, defeating Enzo Couacaud in the final. He became the youngest Paraguayan to win an ATP Challenger title and the fourth Paraguayan champion in ATP Challenger Tour history and first since Ramon Delgado in 2009. As a result, he reached the top 300 on 6 May 2024.

## Davis Cup

Vallejo represents Paraguay at the Davis Cup, where he has a win–loss record of 5–3.

## ATP Challenger Tour finals
### Singles: 4 (1 title, 3 runner-ups)

* Legend
* ATP Challenger Tour (1–3)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | Jul 2023 | Santa Fe, Argentina | Challenger | Clay | Mariano Navone | 2–6, 4–6 |
| Win | 1–1 | Mar 2024 | São Leopoldo, Brazil | Challenger | Clay | Enzo Couacaud | 6–3, 6–2 |
| Loss | 1–2 | Sep 2024 | Antofagasta, Chile | Challenger | Clay | Juan Manuel Cerúndolo | 6–3, 2–6, 4–6 |
| Loss | 1–3 | Jan 2025 | Tigre, Argentina | Challenger | Clay | Juan Pablo Varillas | 4–6, 4–6 |

### Doubles: 1 (1 title)

* Legend
* ATP Challenger Tour (1–0)
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Win | 1–0 | Aug 2023 | Lima, Peru | Challenger | Clay | Gonzalo Bueno | Jorge Panta Ignacio Buse | 6–4, 6–2 |

## ITF World Tennis Tour finals
### Singles: 3 (1 title, 2 runner-ups)

* Legend
* ITF WTT (1–2)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | Nov 2022 | M15 Madrid, Spain | WTT | Hard | David Jordà Sanchis | 3–6, 1–6 |
| Loss | 0–2 | Jul 2023 | M25 Rosario, Argentina | WTT | Clay | Juan Ignacio Londero | 3–6, 2–6 |
| Win | 1–2 | Aug 2024 | M25 Idanha-a-Nova, Portugal | WTT | Hard | Alastair Gray | 6–2, 6–3 |

### Doubles: 7 (5 titles, 2 runner-ups)

* Legend
* ITF WTT (5–2)
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Win | 1–0 | Jul 2022 | M15 Los Angeles, USA | WTT | Hard | Ethan Quinn | Aidan Mayo Keenan Mayo | 7–5, 6–4 |
| Win | 2–0 | Jul 2022 | M15 Fountain Valley, USA | WTT | Hard | Ethan Quinn | Abraham Asaba Sekou Bangoura | 6–0, 3–6, [10–8] |
| Loss | 2–1 | Dec 2022 | M25 Trnava, Slovakia | WTT | Hard (i) | Daniel Rincón | Mats Hermans Mick Veldheer | 6–1, 3–6, [8–10] |
| Win | 3–1 | Dec 2022 | M15 Trnava, Slovakia | WTT | Hard (i) | Daniel Rincón | Abedallah Shelbayh Coleman Wong | 6–4, 6–2 |
| Win | 4–1 | Jan 2023 | M15 Manacor, Spain | WTT | Hard | Daniel Rincón | Svyatoslav Gulin Ilya Snițari | 6–4, 7–6$^{(7–5)}$ |
| Loss | 4–2 | Feb 2023 | M15 Antalya, Turkey | WTT | Clay | Igor Gimenez | Matteo De Vincentis Arthur Reymond | 6–7$^{(5–7)}$, 4–6 |
| Win | 5–2 | May 2024 | M25 Carnac, France | WTT | Clay | Federico Agustín Gómez | Christoph Negritu Alexander Merino | 6–3, 7–5 |

## Junior Grand Slam finals
### Doubles: 1 (1 runner-up)

| Result | Year | Tournament | Surface | Partner | Opponents | Score |
| Loss | 2022 | Australian Open | Hard | Alex Michelsen | Bruno Kuzuhara Coleman Wong | 3–6, 6–7$^{(3–7)}$ |