National team manager Vahid Halilhodzic believes his players "deserve two glasses of champagne" after Thursday's dramatic 2-1 World Cup-qualifying win over Iraq, but warned they will have to sharpen up at set pieces before they take on Australia on Tuesday.

Hotaru Yamaguchi scored a 95th-minute winner to resuscitate Japan's bid for a place at a sixth straight World Cup, salvaging a match that looked destined for a draw after Saad Abdul-Amir's 60th-minute header from a free kick canceled out Genki Haraguchi's first-half opener.

Halilhodzic, whose job was reportedly on the line after starting the final Asian round of Russia 2018 qualifiers with a loss to the United Arab Emirates and a narrow win over Thailand, breathed a sigh of relief but lamented the defending on Abdul-Amir's goal after watching his team concede twice from set pieces against the UAE.