| Issam Jellali | |
| Native Name Lang: | ar |
| Residence: | Dubai, United Arab Emirates |
| Birth Date: | 22 March 1981 |
| Birth Place: | Tunisia |
| Plays: | Right-handed (two-handed backhand) |
| Careerprizemoney: | $7,749 |
| Singlestitles: | 0 |
| Highestsinglesranking: | No. 1111 (31 March 2003) |
| Highestdoublesranking: | No. 801 (1 March 2004) |
Issam Jellali (ar|عصام جلالي|link=no; born 22 March 1981)[1] is a Tunisian tennis coach and a former player.[2] Currently, he coaches compatriot Ons Jabeur.[3] Jellali represented Tunisia in the Davis Cup three times in 1998, 2002 and 2003, with a record of four wins (all doubles) for six defeats.
He played around 50 professional tournaments from 1997 to 2009, notably participating in the qualifications for Dubai Tennis Championships in 2001 and the Tunis Challenger in 2002. In doubles, he won a Futures tournament in Bressuire with Malek Jaziri in 2004. Owner and director of a tennis academy in Dubai, he is the coach of Malek Jaziri and Damir Džumhur. In February 2020, he became full-time coach of his compatriot Ons Jabeur.