2018 Mubadala World Tennis Championship – Men's singles

Kevin Anderson was the competition's defending champion, but lost in the final from Novak Djokovic.

Seeds
• # 🇷🇸 Novak Djokovic (champion)

• # 🇪🇸 Rafael Nadal (semifinals) (withdrew from playing 3rd place play-off)

• # Kevin Anderson (final) (runner-up)

• # 🇦🇹 Dominic Thiem (quarterfinals) (fourth place)

• # 🇷🇺 Karen Khachanov (semifinals) (third place)

• # 🇰🇷 Hyeon Chung (quarterfinals) (fifth place)