In a tense and dramatic finale, the Zagreb side secured their second championship title in the Kingdom of SHS. After winning first place in the Zagreb Football Sub-Association championship, the blues entered the playoffs for the national championship where they defeated Ilirija from Ljubljana 7-1 in the quarter-finals, Slavija from Osijek 7-0 in the semi-finals, and in the final clash on July 25th, their great rivals Jugoslavija from Belgrade 2-1.

In the system of that time, the knockout phase still featured only single matches, without return legs. Thus in the final clash, Građanski was the home team, but not at their ground in Koturaška, rather on Concordia's pitch in today's Kranjčevićeva Street. The Zagreb side would occasionally play some of their more important matches there due to its larger capacity. Franjo Joža Giller was the absolute hero of the quarter-final clash against Ilirija when he scored six of the seven goals for the blues, then he found the net three times against Slavija in the semi-final, and it was precisely he who initiated the move and then scored the winning goal from the penalty spot against Jugoslavija three minutes before the end.

In the first half hour, the visitors were superior, and Građanski's popular goalkeeper Maksimilian Maks Mihelčić had already prevented the Belgrade side from taking the lead in the fourth minute with a brilliant reaction. Franz Mantler conceded a penalty, Branislav Sekulić placed the ball on the spot, fired powerfully under the crossbar, but Mihelčić, as contemporary journalists noted – "made a colossal save". With his save he punched the ball out for a corner. Sekulić would later initiate the visitors' opening goal nonetheless. In the 17th minute he led an attack, Mihelčić rushed out but came up short, and Dušan Petković slotted home from close range into an empty goal.

The Zagreb side equalized in the 39th minute when Luka Vidnjević delivered a cross, Emanuel Emil Perška received the ball, turned and fired powerfully into the corner. At the start of the second half, Giller rattled the crossbar from a free kick, and in the very finale he prepared and converted the winning goal. He was shooting from a free kick again, launching the ball under the crossbar from 17 meters, but goalkeeper Stevan Nikolić made a save and deflected it for a corner. The corner kick was taken by Jenő Abraham, the popular Szaraz, and visiting defender Milutin Ivković handled the ball. Giller scored from the penalty for 2-1 and a new championship title.