.
Delic has reached a career high singles ranking of world No. 150, achieved on 5 January 2015, as well as a career high doubles ranking of world No. 348, achieved on 18 October 2013.
Delic has reached 18 career singles finals, posting a tally of 5 wins and 13 losses, which includes a 0–2 record in
ITF Futures
Tour.
Juniors
As a junior, Delic reached a career high combined singles and doubles ranking of world No. 19, which he achieved on December 31, 2011. His best results in the junior grand slams were a semifinal finish at the
Filip Horansky
.
Professional career
In July 2011, Delic made his ATP Tour debut when he was granted a wildcard entry into the main draw of the 2011 Croatian Open. He would go on the lose to Italian Gianluca Naso in straight sets 4–6, 2–6. In 2014 he was given a wildcard into the main draw of the 2014 Zagreb Indoors where again he was defeated in the first round, this time by compatriot and fifth seed Marin Čilić4–6, 4–6. Three months later at the 2014 Düsseldorf Open he qualified for a main draw for the first time in his career, and then went on to defeat Michał Przysiężny in the first round 7–5, 7–5, as well as Dustin Brown in the second round 6–3, 6–0, before eventually falling in the quarterfinals to Philipp Kohlschreiber in three sets 5–7, 6–4, 1–6. His only other win at the ATP Tour level was in a singles tie of Davis Cup play, where he represents his native Croatia.