Paraguayan tennis player (born 2004)
Adolfo Daniel Vallejo (born 28 April 2004) is a Paraguayan tennis player. Vallejo has a career-high ATP singles ranking of world No. 251 achieved on 19 August 2024. He is currently the No. 1 Paraguayan tennis player.[2]
On the ITF Junior Circuit, Vallejo had a career-high junior ranking of No. 1, achieved in August 2022.[3]
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
[edit]2023: Maiden ATP Challenger doubles title
[edit]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 300
[edit]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.[4][5] As a result, he reached the top 300 on 6 May 2024.
Vallejo represents Paraguay at the Davis Cup, where he has a win–loss record of 5–3.
ATP Challenger Tour finals
[edit]Singles: 3 (1 title, 2 runner-ups)
[edit] | Legend | | ATP Challenger Tour (1–2) | | |
Doubles: 1 (1 title)
[edit] | Legend | | ATP Challenger Tour (1–0) | | |
ITF World Tennis Tour finals
[edit]Singles: 3 (1 title, 2 runner-ups)
[edit] | 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)
[edit] | 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
[edit]Doubles: 1 (1 runner-up)
[edit]
French
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Paraguay
Mariano Navone 
Enzo Couacaud 
Gonzalo Bueno 
David Jordà Sanchis 
Alastair Gray 
Ethan Quinn 
Abraham Asaba 
Mats Hermans 
Abedallah Shelbayh 
Coleman Wong 
Svyatoslav Gulin 
Ilya Snițari 
Igor Gimenez 
Matteo De Vincentis 
Christoph Negritu 
