Dea Herdželaš (born 7 November 1996) is a Bosnian professional tennis player.

Herdželaš achieved a career-high singles ranking of world No. 183 on 23 May 2022, and reached a best doubles ranking of 334 in June 2023. As a junior, she had a best combined ranking of world No. 82, which she achieved on 21 January 2013.

Herdželaš made her debut for the Bosnia and Herzegovina Fed Cup team in February 2013, losing to Anne Keothavong of Great Britain.^[1]

Herdželaš won the 2012 Serbian national team championships with TK Partizan,^[2] winning each of her three singles matches.^[3]

Partnering Nefisa Berberović, she won the silver medal in the women's doubles at the 2018 Mediterranean Games, losing to Turkish pair Başak Eraydın and İpek Öz in the final which went to a deciding champions tiebreak.^[4]

Herdželaš has reached 19 career singles finals posting a record of nine wins. Additionally, she has reached 23 career doubles finals (7 titles). All of her finals both singles and doubles have come on the ITF Circuit.

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Loss	0–1	Jun 2014	ITF Niš, Serbia	10,000	Clay	Maria Sakkari	6–3, 4–6, 1–6
Win	1–1	Sep 2014	ITF Belgrade, Serbia	10,000	Clay	Nina Alibalić	6–2, 6–2
Loss	1–2	Sep 2014	ITF Vrnjačka Banja, Serbia	10,000	Clay	Valentini Grammatikopoulou	6–1, 3–6, 6–7(5)
Win	2–2	Dec 2014	ITF Sousse, Tunisia	10,000	Hard	Martina Caregaro	6–7(4), 6–2, 6–1
Loss	2–3	Apr 2015	ITF Cairo, Egypt	10,000	Clay	Tereza Mihalíková	5–7, 3–6
Loss	2–4	Jul 2015	ITF Savitaipale, Finland	10,000	Clay	Daria Mishina	4–6, 6–4, 4–6
Win	3–4	Aug 2015	ITF Tunis, Tunisia	10,000	Clay	Jelena Simić	3–6, 7–6(6), 6–3
Loss	3–5	Sep 2016	ITF Sharm El Sheikh, Egypt	10,000	Hard	Anna Morgina	4–6, 0–6
Win	4–5	Oct 2016	ITF Sharm El Sheikh, Egypt	10,000	Hard	Anna Morgina	6–1, 7–6(5)
Win	5–5	Apr 2017	ITF Cairo, Egypt	15,000	Clay	Irina Fetecău	6–3, 6–1
Loss	5–6	Jul 2018	ITF Setúbal, Portugal	25,000	Hard	Ylena In-Albon	5–7, 2–6
Loss	5–7	May 2019	Khimki Cup, Russia	25,000	Hard	Sofya Lansere	1–6, 6–4, 3–6
Loss	5–8	Jan 2020	ITF Stuttgart, Germany	15,000	Hard	Julia Terziyska	3–6, 4–6
Win	6–8	Feb 2021	ITF Antalya, Turkey	15,000	Clay	Nuria Brancaccio	6–7(1), 6–2, 7–5
Win	7–8	May 2021	ITF Šibenik, Croatia	15,000	Clay	Darja Viďmanová	6–2, 3–6, 6–4
Win	8–8	Jun 2021	ITF Vilnius, Lithuania	15,000	Hard	Anzhelika Isaeva	6–2, 4–0 ret.
Loss	8–9	Aug 2021	ITF Koksijde, Belgium	25,000	Clay	Mirjam Björklund	6–7(6), 3–6
Loss	8–10	Oct 2021	ITF Lima, Peru	25,000	Clay	Anna Sisková	6–3, 5–7, 0–6
Win	9–10	Oct 2021	ITF Lima, Peru	25,000	Clay	Katharina Gerlach	6–2, 6–2

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Loss	0–1	Sep 2013	ITF Budva, Montenegro	10,000	Clay	Ana Bianca Mihăilă	Ema Mikulčić Dejana Raickovic	2–6, 2–6
Win	1–1	Sep 2013	ITF Solin, Croatia	10,000	Clay	Barbara Kötelešová	Gabriela Pantůčková Dominika Paterová	7–6(4), 6–3
Loss	1–2	Mar 2014	ITF Sharm El Sheikh, Egypt	10,000	Hard	Natasha Palha	Nina Stojanović Ana Veselinović	0–6, 6–4, [6–10]
Loss	1–3	May 2014	ITF Bastad, Sweden	10,000	Clay	Conny Perrin	Kim Grajdek Maria Sakkari	5–7, 4–6
Win	2–3	Sep 2014	ITF Vrnjačka Banja, Serbia	10,000	Clay	Nina Stojanović	Daria Lodikova Kateryna Sliusar	6–3, 6–0
Loss	2–4	Nov 2014	ITF Sousse, Tunisia	10,000	Hard	Jelena Simić	Natela Dzalamidze Oleksandra Korashvili	3–6, 1–6
Loss	2–5	Jul 2015	ITF Bol, Croatia	10,000	Clay	Barbara Kötelešová	Rebeka Stolmár Szabina Szlavikovics	6–7(5), 0–6
Loss	2–6	Jul 2015	ITF Tampere, Finland	10,000	Clay	Cristina Ene	Nora Niedmers Hélène Scholsen	4–6, 6–7(5)
Win	3–6	Jul 2015	ITF Savitaipale, Finland	10,000	Clay	Rosalie van der Hoek	Nora Niedmers Hélène Scholsen	7–6(3), 7–5
Loss	3–7	Feb 2016	ITF Beinasco, Italy	25,000	Clay	Lina Gjorcheska	Arantxa Rus İpek Soylu	4–6, 2–6
Loss	3–8	May 2017	ITF La Marsa, Tunisia	25,000	Clay	Tereza Mrdeža	Katarzyna Kawa Jasmina Tinjić	5–7, 4–6
Loss	3–9	Jul 2017	Bursa Cup, Turkey	60,000	Clay	Aleksandra Pospelova	Valentyna Ivakhnenko Anastasiya Vasylyeva	3–6, 7–5, [1–10]
Loss	3–10	Sep 2017	ITF Mamaia, Romania	15,000	Clay	Oana Georgeta Simion	Anastasiya Komardina Elena-Gabriela Ruse	6–3, 1–6, [6–10]
Win	4–10	Dec 2017	ITF Indore, India	15,000	Hard	Hsu Ching-wen	Albina Khabibulina Ksenia Palkina	6–2, 6–1
Win	5–10	Feb 2018	ITF Antalya, Turkey	15,000	Hard	Ekaterine Gorgodze	Martina Caregaro Federica di Sarra	6–2, 6–4
Win	6–10	Mar 2018	ITF Antalya, Turkey	15,000	Clay	Ágnes Bukta	Amina Anshba Anastasiya Vasylyeva	6–3, 6–3
Loss	6–11	Jun 2018	ITF Padova, Italy	25,000	Clay	Tereza Mrdeža	İpek Soylu Anastasia Zarycká	4–6, 1–6
Loss	6–12	Aug 2018	ITF Koksijde, Belgium	25,000	Clay	Tereza Mihalíková	Anna Bondár Raluca Șerban	3–6, 0–6
Loss	6–13	Jun 2019	ITF Bethany Beach, U.S.	25,000	Clay	Tereza Mihalíková	Usue Maitane Arconada Hayley Carter	4–6, 4–6
Loss	6–14	Jan 2021	ITF Cairo, Egypt	15,000	Clay	Anita Husarić	Quirine Lemoine Gabriella Mujan	6–4, 3–6, [6–10]
Loss	6–15	Oct 2021	ITF Guayaquil, Ecuador	25,000	Clay	Victoria Rodríguez	María Herazo González María Paulina Pérez	3–6, 6–4, [7–10]
Loss	6–16	Nov 2022	ITF Heraklion, Greece	25,000	Clay	Lina Gjorcheska	Oana Gavrilă Lia Karatancheva	4–6, 4–6
Win	7–16	Mar 2023	ITF Bangalore, India	25,000	Hard	Eden Silva	Francisca Jorge Matilde Jorge	3–6, 6–4, [10–7]

Herdželaš made her Fed Cup debut for Bosnia and Herzegovina in 2013, while the team was competing in the Europe/Africa Zone Group I, when she was 16 years and 92 days old.

Edition	Stage	Date	Location	Against	Surface	Opponent	W/L	Score
2013	Z1 RR	Feb 2013	Eilat (ISR)	Great Britain	Hard	Anne Keothavong	L	4–6, 2–6
				Hungary		Gréta Arn	L	3–6, 2–6
2014	Z2 RR	Apr 2014	Šiauliai (LTU)	Egypt	Hard (i)	Sandra Samir	L	6–4, 4–6, 2–6
	Z2 PO			Liechtenstein		Kathinka von Deichmann	L	5–7, 4–6
2016	Z2 RR	Apr 2016	Cairo (EGY)	Liechtenstein	Clay	Stephanie Vogt	W	7–5, 2–6, 6–4
				Egypt		Sandra Samir	W	6–3, 6–4
				Austria		Barbara Haas	L	5–7, 1–6
	Z2 PO			Denmark		Karen Barritza	W	6–0, 6–3
2017	Z1 RR	Feb 2017	Tallinn (EST)	Hungary	Hard (i)	Tímea Babos	L	4–6, 1–6
				Croatia		Ana Konjuh	L	0–6, 2–6
	Z1 PO			Portugal		Michelle Larcher de Brito	L	1–6, 2–6
2018	Z2 RR	Apr 2018	Athens (GRE)	Luxembourg	Clay	Mandy Minella	L	7–5, 5–7, 1–6
				Israel		Julia Glushko	L	6–4, 2–6, 0–6
				Norway		Malene Helgø	W	6–4, 6–2
	Z2 PO			Egypt		Sandra Samir	L	0–2 ret.
2019	Z2 RR	Feb 2019	Esch-sur-Alzette (LUX)	Tunisia	Hard (i)	Ons Jabeur	L	0–6, 4–6
2020–21	Z3 RR	Jun 2021	Vilnius (LTU)	Rwanda	Hard (i)	Joselyn Umulisa	W	6–1, 6–0
				Cyprus		Raluca Șerban	L	4–6, 7–5, 3–6
	Z3 PO			Ireland		Anna Bowtell	W	6–3, 6–4
				Norway		Ulrikke Eikeri	L	5–7, 3–6
2022	Z3 RR	Jun 2022	Ulcinj (MNE)	Nigeria	Clay	Adesuwa Osabuohien	W	6–0, 6–2
				Montenegro		Iva Lakić	W	6–0, 6–2
	Z3 PO			Morocco		Aya El Aouni	W	6–2, 6–4

Edition	Stage	Date	Location	Against	Surface	Partner	Opponents	W/L	Score
2013	Z1 RR	Feb 2013	Eilat (ISR)	Hungary	Hard	Anita Husarić	Tímea Babos Katalin Marosi	L	5–7, 4–6
				Portugal			Michelle Larcher de Brito Bárbara Luz	L	1–6, 0–6
2014	Z2 RR	Apr 2014	Šiauliai (LTU)	South Africa	Hard (i)	Jasmina Tinjić	Natalie Grandin Chanel Simmonds	W	3–6, 7–6(7–3), 6–4
2016	Z2 RR	Apr 2016	Cairo (EGY)	Egypt	Clay	Ema Burgić Bucko	Dona Abo Habaga Laila Elnimr	W	6–3, 7–5
				Austria		Anita Husarić	Barbara Haas Sandra Klemenschits	L	1–6, 3–6
	Z2 PO			Denmark		Ema Burgić Bucko	Karen Barritza Emilie Francati	W	6–4, 6–3
2017	Z1 RR	Feb 2017	Tallinn (EST)	Hungary	Hard (i)	Anita Husarić	Ágnes Bukta Fanni Stollár	L	4–6, 3–6
				Croatia			Darija Jurak Tena Lukas	L	6–7(6–8), 2–6
2018	Z2 RR	Apr 2018	Athens (GRE)	Luxembourg	Clay	Anita Husarić	Mandy Minella Eléonora Molinaro	L	5–7, 3–6
				Norway		Jelena Simić	Astrid Wanja Brune Olsen Malene Helgø	W	6–0, 6–2
2020–21	Z3 RR	Jun 2021	Vilnius (LTU)	Cyprus	Hard (i)	Nefisa Berberović	Eleni Louka Raluca Șerban	W	6–3, 6–2

Result	Date	Location	Surface	Partner	Opponents	Score
Loss	Jun 2018	Tarragona, Spain	Clay	Nefisa Berberović	Başak Eraydın İpek Öz	6–0, 3–6, [10–12]

• Dea Herdželaš at the Women's Tennis Association
• Dea Herdželaš at the International Tennis Federation
• Dea Herdželaš at the Billie Jean King Cup (archived)