Gaël Monfils defeated Andrey Rublev in the final, 6–2, 6–3 to win the singles tennis title at the 2018 Qatar Open. Novak Djokovic was the two-time reigning champion, but withdrew before the tournament due to an elbow injury. Seeds Draw Finals Top half Bottom half Qualifying Seeds Qualifiers Qualifying draw First qualifier Second qualifier Third qualifier Fourth qualifier References Main Draw Qualifying Draw Singles