Frank Kisakye threw in the towel earlier in the day, paving way for Mbanga to assume the coaching duties in a coup d'état style that left Charles Sebugwawo seething. However, his career as Observer coach would later end even before it got started after a series of poor decisions cost the team.
A self-confessed KCC and Chelsea fan, Mbanga benched the likes of James Tumusiime, Abubaker Mulumba and Richard Kavuma and instead opted for the young blood like Alon Mwesigwa, Edward Ssekika and Sulaiman Kakaire. The decision paid immediate dividends as Observer took a 2-0 halftime lead.
Looking untroubled, Mbanga's charges were set for a first win in six attempts. Mbanga quickly anointed himself the 'Special One' during half-time team talk and in a bid to emulate his idol Jose Mourinho, he stretched his luck too far when he made three unwarranted substitutions. From there on, things went haywire.
The Blues conceded shortly after restart as Blue Cube players - many of whom were suspected to be mercenaries - ran rings around the Observer defence. By the end of the 90 minutes, Observer had conceded three more, setting up a tense showdown in the locker-room.
Upon the final whistle, many Blues players avoided Mbanga's outstretched handshake. In the post-match team talk, sporting director Hassan Badru Zziwa sacked Mbanga with immediate effect. Mbanga, who needed extra security to leave the venue said: "I understand the disappointment but I'm happy with what I did. The players just didn't understand my tactics."
This is not the first time the Blues have sacked someone after a poor performance.
Back in 2010, Edris Kiggundu's refereeing career was cut short following his poor handling of the Observer - UETCL game that ended 2-2. Kiggundu was banished from officiating any match involving the Observer.