Sparta Prague and loans Deli signed for the
Czech First League side
Sparta Prague in 2012, but made no league appearances for the club. He gained competitive experience in the Czech league by playing on loan for
České Budějovice in the second-tier
Czech National Football League and in the First League for
Příbram.
Slavia Prague Deli moved from Sparta Prague to their rivals
Slavia Prague, who were then struggling to avoid relegation, in January 2015. He quickly established himself in Slavia, playing in 66 out of their 74 league matches in his first three seasons. He won the
2016–17 Czech First League title with Slavia Prague, and was the runner-up for the Best Defender of the Year award. During that season, he did not receive a single yellow card. In June 2017, Deli extended his contract until June 2020. On 1 February 2021, Deli returned former club
Slavia Prague on a loan deal until the end of the season.
Adana Demirspor Deli moved to
Süper Lig club
Adana Demirspor in August 2021, having agreed a three-year contract.
Slavia Prague B On 11 July 2025, Deli signed a contract with
Czech National Football League club
Slavia Prague B. ==International career==