Until 2004: Junior career and first successes in future tournaments
Adrian Ungur started playing tennis at the age of eight. From 2001 to 2003 he took part in international junior tournaments and was able to win several titles. As a result, he rose to 10th place in the junior world rankings. Since 2001, he has also participated in professional tournaments and was able to win his first future title in Romania in May 2004 . In the further course of the year he reached three more future finals, one of which he won.
2005–2007: Establishment on the Challenger Tour
In 2005 Adrian Ungur won four more Future titles. Since he had advanced to the top 400 in the world rankings , he now played more tournaments on the ATP Challenger Tour . He was able to reach two semi-finals in Oberstaufen and Brașov . In May 2006 Ungur was in Rome for the first time in the final of a Challenger tournament, but he lost in three sets against Oliver Marach . Almost two months later, another final followed in Constanța , but Ungur again went as a loser against Konstantinos Economidis . Due to these successes, he entered the top 200 of the world rankings for the first time. In 2007 Adrian Ungur tried for the first time to qualify for the Grand Slam tournaments in Melbourne and Paris , but did not make it into the main field. At Challenger level, he reached a final in Todi in September 2007 , but lost it to Stefano Galvani .
2008–2011: Challenger title and ATP debut
In June 2008 Adrian Ungur was finally able to win his first title in Sofia in his fourth Challenger final against Franco Ferreiro . Two weeks later he reached another final in Constanța , but there his winning streak ended against Nicolas Devilder . The following year was less successful for Ungur: Between July 2008 and May 2009 there were a total of twelve first round defeats. After he had achieved his best-up-to-date world rankings in July 2008 with position 169, he had dropped to position 621 a year later. In September 2009, however, Adrian Ungur found his way back on the road to success: After a semifinal participation in Brașov , he reached the final of the Challenger tournament in Todi as a qualifier, in which he was only barely defeated by Simon Greul . Just a week later he was in another final in Palermo and was able to win his second Challenger title there against Albert Ramos-Viñolas . In May 2010 Adrian Ungur was appointed to the Romanian Davis Cup team for the first time . Although he lost his individual against Serhij Stachowskyj , Romania still won 3-1 against Ukraine. In the promotion game for the world group in September 2010, Ungur then contributed two individual victories to the 5-0 victory over Ecuador. After he had reached a total of four Challenger semifinals this season and thus worked his way up to 122nd place in the world rankings, he received a wildcard for the ATP tournament in Bucharest . In the first round he was able to prevail in a close three-set match against the top 100 player Andreas Seppi , who was in 7th position , but was then eliminated by Björn Phau .
After a less strong 2010 with only one title in doubles in Rimini , he qualified for an ATP tournament for the first time in Acapulco in February . In the first main round, however, he had no chance against the later tournament winner David Ferrer, who was in position 1 . In the Davis Cup match against Argentina that followed, Ungur won after a defeat by David Nalbandian in the last individual against the top 50 player Juan Mónaco , but at this point Romania was already 4-0 down. In April 2011 Ungur qualified for another ATP tournament in Belgrade . After a narrow win over Rubén Ramírez Hidalgo , he met world number one Novak Đoković in the second round , against whom he lost smoothly. At the Challenger level, Ungur was able to win two tournaments this year: In July 2011 he won the final of San Benedetto over Stefano Galvani , a month later he won the final in Manerbio against Peter Gojowczyk . For the ATP tournament in Bucharest in September 2011, he received a wildcard as in the previous year and was able to reach the second round again by defeating Lukáš Rosol before he was eliminated by João Souza . In October 2011 he reached another Challenger final in Palermo , but lost there straight to Carlos Berlocq .
From 2012: Entry into the top 100
The year 2012 began for Adrian Ungur with a Challenger final participation in Bucaramanga , where he lost to Wayne Odesnik . In February 2012 he was directly qualified for an ATP tournament in Viña del Mar for the first time, but was eliminated in the first round against Horacio Zeballos . Three weeks later, Ungur was again in a Challenger final in Meknes . Although he lost this against Yevgeny Donskoy , he went into the top 100 of the world rankings for the first time. At the end of March, Ungur was in a Challenger final in Marrakech for the third time this year, and for the third time he lost the field against Martin Kližan . At the French Open , Ungur finally made his Grand Slam debut and was able to reach the second round immediately after beating former world number three David Nalbandian. There he met the third-placed semi-finalist Roger Federer , against whom he was able to win a set. On June 11, 2012, he reached 79th place in the individual world ranking, his career record. He then reached the peloton four times in a row at the Grand Slam tournaments, but never got past the first round. At the Olympic Games in London in July , Ungur was eliminated from the singles after losing to Gilles Müller in the first round. Even in doubles , he did not get beyond the opening game with Horia Tecău . In August 2012 Ungur won the Challenger tournament in Sibiu after defeating his compatriot Victor Hănescu in straight sets in the final.
During the 2013 season he won the singles tournaments in Tunis and Arad on the Challenger Tour, and the following year he secured his eighth Challenger singles title in San Marino . In contrast, the 2014 season was more successful for Ungur in doubles, when he won the doubles competitions in Cordenons (with Potito Starace ), Brașov (with Daniele Giorgini ) and Sibiu (with Starace) in August and September . At the start of the season in 2015, Laurynas Grigelis won the tournament in doubles in Casablanca before he achieved the greatest success in doubles of his career in April. At the World Tour tournament in Bucharest , Ungur started with Marius Copil thanks to a wildcard and won the competition with him. In the final they beat Nicholas Monroe and Artem Sitak with 17:15 in the match tie-break. In September Ungur prevailed in Sibiu in the final of the Challenger tournament against Pere Riba in three sets, which he won his second title in Sibiu and the ninth and last individual title on the Challenger Tour. There were no further successes until his resignation. Ungur resigned from professional tennis after the Sibiu Open 2018 . In the Davis Cup , Ungur played a total of 26 games for Romania, all of them singles, and won 12 of them.
Private
Ungur is married to the former professional tennis player Liana-Gabriela Ungur , the daughter of the Romanian football player and coach Ilie Balaci .