El‎-Haggar works with famous composers and lyricists as well as with other singers in duets whenever possible‎.‎ ‎"‎In duets I like to deal with talented singers‎;‎ as competing with clever singers motivates me to explore my capabilities to execute the song in the best distinguished manner‎"‎‎.‎ During his career El‎-Haggar has performed a number of duets with singers such as his career companion Mohammed El‎-Helw‎,‎ in songs such as ‎"‎Beladi‎"‎ and ‎"‎Khan El‎-Anadeel‎"‎ ‎(‎the opening and closing of a TV serial carrying the same name‎)‎‎,‎ with Hanan Mady in many television serial songs like ‎"‎El‎-Likaa El‎-Tany & El‎-Mal we El‎-Banoon‎"‎‎,‎ with Angham in the play ‎"‎Rosasa Fi El Qalb‎"‎‎,‎ and with Hoda Ammar in ‎"‎Bent we Walad‎"‎ from the movie Eskendereyya New York‎.‎