# Duje Ajduković

Duje Ajduković (born 5 February 2001) is a Croatian tennis player. He has a career high ATP singles ranking of world No. 105 achieved on 9 September 2024. He also has a career high ATP doubles ranking of No. 491 achieved on 8 November 2021. He is currently the No. 2 Croatian player.

## Professional career
### 2021: ATP debut

Ajduković made his ATP main draw debut at the 2021 Croatia Open Umag after receiving a wildcard into the singles and doubles main draws.

### 2023 : First Challenger title

In August 2023, Ajdukovic won his first ATP Challenger title in Lüdenscheid, Germany after going through the qualifying, defeating Hugo Dellien in the final in straight sets.

### 2024: First ATP semifinal, ATP 500 and top 105 debuts

He reached a new career high of No. 115 on 1 April 2024. He qualified for his first ATP 500 tournament at the 2024 Barcelona Open Banc Sabadell.
He reached his first semifinal as a qualifier at the 2024 Swedish Open in Bastad, defeating Luca Van Assche, eight seed Pavel Kotov and Thiago Monteiro. He lost to Rafael Nadal in three sets. As a result he reached the top 110 in the rankings on 22 July 2024.
Following his second Challenger title in Manacor, after a win over Matteo Gigante in the final, he reached the top 105 in the rankings on 9 September 2024.

## ATP Challenger Tour finals
### Singles: 5 (3 titles, 2 runner-ups)

* Legend
* ATP Challenger Tour (3–2)
* Finals by surface
* Hard (2–1)
* Clay (1–1)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Win | 1–0 | July 2023 | Lüdenscheid, Germany | Challenger | Clay | Hugo Dellien | 7–5, 6–4 |
| Loss | 1–1 | Sep 2023 | Braga, Portugal | Challenger | Clay | Oriol Roca Batalla | 6–4, 1–6, 1–6 |
| Win | 2–1 | Nov 2023 | Kobe, Japan | Challenger | Hard (i) | Sho Shimabukuro | 6–4, 6–2 |
| Loss | 2–2 | Jan 2024 | Quimper, France | Challenger | Hard (i) | Pierre-Hugues Herbert | 3–6, 2–6 |
| Win | 3–2 | Aug 2024 | Manacor, Spain | Challenger | Hard | Matteo Gigante | 4–6, 6–3, 6–4 |

## ITF Futures/World Tennis Tour finals
### Singles: 10 (7 titles, 3 runner-ups)

* Legend
* ITF Futures/WTT (7–3)
* Finals by surface
* Hard (0–1)
* Clay (7–2)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | Oct 2018 | Tunisia F34, Monastir | Futures | Hard | Baptiste Crepatte | 7–5, 6–7$^{(3–7)}$, 2–6 |
| Loss | 0–2 | Sep 2019 | M15 Székesfehérvár, Hungary | WTT | Clay | Michael Vrbenský | 2–6, 2–6 |
| Win | 1–2 | Oct 2019 | M15 Tabarka, Tunisia | WTT | Clay | Pol Toledo Bagué | 6–3, 6–1 |
| Win | 2–2 | Nov 2019 | M15 Antalya, Turkey | WTT | Clay | Álvaro López San Martín | 6–2, 6–4 |
| Win | 3–2 | Mar 2020 | M25 Antalya, Turkey | WTT | Clay | Pedro Cachín | 3–6, 6–4, 7–6$^{(7–2)}$ |
| Win | 4–2 | Sep 2020 | M15 Curtea de Argeș, Romania | WTT | Clay | Franco Agamenone | 2–6, 6–4, 6–4 |
| Win | 5–2 | Apr 2023 | M25 Dubrovnik, Croatia | WTT | Clay | Luka Mikrut | 6–3, 6–2 |
| Win | 6–2 | Apr 2023 | M25 Split, Croatia | WTT | Clay | Eric Vanshelboim | 6–3, 6–4 |
| Loss | 6–3 | Apr 2023 | M15 Kuršumlijska Banja, Serbia | WTT | Clay | Maks Kaśnikowski | 4–6, 6–7$^{(3–7)}$ |
| Win | 7–3 | Jun 2023 | M25 Kiseljak, Bosnia and Herzegovina | WTT | Clay | Pedro Boscardin Dias | 6–2, 7–5 |

### Doubles: 3 (2 titles, 1 runner-up)

* Legend
* ITF Futures/WTT (2–1)
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Loss | 0–1 | Oct 2018 | Tunisia F34, Monastir | Futures | Hard | Petros Tsitsipas | Bernardo A. Pereira e Oliveira Robert Strombachs | 4–6, 7–6$^{(8–6)}$, [6–10] |
| Win | 1–1 | Nov 2019 | M15 Antalya, Turkey | WTT | Clay | Karlo Kranić | Dragoș Dima Mircea-Alexandru Jecan | 6–3, 3–6, [10–6] |
| Win | 2–1 | Dec 2019 | M15 Antalya, Turkey | WTT | Clay | Miljan Zekić | Vladimir Korolev Andrey Uvarov | 6–3, 6–3 |

## National representation
### Davis Cup (0–1)

* Group membership
* Finals (0–1)
* Qualifying Round (0–0)
* Matches by surface
* Hard (0–1)
* Clay (0–0)
* Grass (0–0)
* Matches by type
* Singles (0–1)
* Doubles (0–0)
* Matches by venue
* Home (0–1)
* Away (0–0)
* Neutral (0–0)
* indicates the outcome of the Davis Cup match followed by the score, date, place of event, the zonal classification and its phase, and the court surface.
| Result | No. | Rubber | Match type (partner if any) | Opponent nation | Opponent player(s) | Score |
| 2–1; 17 September 2023; Arena Gripe, Split, Croatia; Davis Cup Final Group D round robin; hard (indoor) surface |||||||
| Defeat | 1 | I | Singles | Netherlands | Botic van de Zandschulp | 3–6, 6–3, 5–7 |