|Full name||Radoslav Galinov Terziev|
|Date of birth||6 August 1994|
|Place of birth||Plovdiv, Bulgaria|
|Height||1.79 m (5 ft 10+1⁄2 in)|
|2013–2014||→ Rakovski (loan)||35||(1)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 27 April 2021|
Born in Plovdiv, Terziev began his career at the Spartak Plovdiv academy but moved to Botev Plovdiv along with Lazar Marin, Lachezar Angelov and Rosen Andonov in January 2012. He then spent one and a half seasons on loan at second-tier Rakovski. He scored his first goal in senior football in a 3–0 win over Akademik Svishtov on 10 November 2013. Terziev totalled 39 appearances in all competitions for Rakovski.
After returning from his loan spell, Terziev made his Botev debut on 3 July 2014, in a 4–0 win over Libertas in the first leg of the first qualifying round of the UEFA Europa League. He played full 90 minutes. Terziev made his A Group debut in a 1–0 home win against Lokomotiv Sofia on 20 July, appearing as a 69th-minute substitute for Milen Gamakov. One month later he made his first league start in a game against Slavia Sofia.
During the second half of season 2015-16 Terziev became a regular central defender in the starting lineup of Botev Plovdiv.
On 16 June 2017, he signed a new 2-year contract.
As one of the most promising defenders Terziev has received call-ups for the Bulgarian U19 and U21 national football teams. On 31 March 2015 he participated in the 1-3 away defeat of Bulgaria U21 from Wales U21. On 9 June 2015 Radoslav Terziev played 90 minutes during the 1-0 win in a friendly game with Cyprus U21.
On 9 October 2015 Terziev played 90 minutes during the 2-0 win over Armenia U21. Five days later, on 14 October, Terziev was again in the starting lineup but this time he and his teammates were defeated with 0-1 by Denmark U21.
In late January 2015, Terziev received his first call-up to the full national side by new manager Ivaylo Petev for a friendly match against Romania but he remained an unused substitute in this game. He was also part of Petar Houbchev's preliminary list for a November 2016 World Cup qualifier against Belarus, but did not make the final squad for the match.
- As of 16 February 2019
|Spartak Plovdiv||B Group||2010–11||1||0||0||0||–||–||1||0|
|Botev Plovdiv||B Group||2011–12||0||0||0||0||–||–||0||0|
|Botev Plovdiv||A Group||2014–15||17||0||1||0||2||0||0||0||20||0|
- Includes Bulgarian Supercup matches.
- Botev Plovdiv
- "Профил на Радослав Галинов Терзиев" (in Bulgarian). fpleague.bg. Retrieved 30 September 2018.
- "Ботев привлече каре юноши на Спартак" (in Bulgarian). marica.bg. 9 January 2012.
- "Botev 4–0 Libertas". uefa.com. 3 July 2014.
- "Ботев тръгна с победа в "А" група" (in Bulgarian). botevplovdiv.bg. 20 July 2014.
- "Botev 2–0 Slavia". soccerway.com. 24 August 2014.
- Ботев загуби от Черно море у дома
- Ботев (Пловдив) триумфира с Купата на България!
- ВИВА КАНАРИ!!! БОТЕВ Я ПРЕГЪРНА
- Ботев постигна мечтата, а клет Лудогорец сгъна платната!
- "Радослав Терзиев поднови договора си с Ботев" (in Bulgarian). botevplovdiv.bg. 16 June 2017.
- Under-21 2017 - Wales-Bulgaria Lineups
- Младежите удариха Кипър
- Терзиев и Гамаков се присъединиха към тима
- Безкомпромисна България не даде шанс на Армения и оглави групата
- България U21 отстъпи на Дания U21 с 0:1 в Олборг
- България не успя да преклони Уелс
- Младежите не успяха да се справят с Уелс (видео)
- Младите "лъвове" отстъпиха пред Франция
- "Радо Терзиев с първа повиквателна за представителния отбор на България". 27 January 2015. Retrieved 7 February 2015.
- "Bulgaria NT vs. Belarus NT 1:0". flashscore.com. 13 November 2016. Retrieved 18 November 2016.