Two national junior records in the 400 metres sprint came for Khamis at the 2013 Arab Athletics Championships: he ran 46.90 seconds in the qualifiers then 46.25 seconds in the final to take the bronze medal (his first senior podium finish) behind Saudi athletes Yousef Masrahi and Ismail Al-Sabiani. He reached the podium for a second time that year at the 2013 Asian Athletics Championships. wtsh