Jules Ulimwengu scored the only goal when former champions Gor Mahia defeated 2009 champions Sofapaka to go top of the FKF Premier league.
But was a reprieve for reigning champions Tusker who managed to register their maiden win after beating Wazito 2-0 at the Ruaraka grounds today.
After finishing second last season, KCB were 2-1 winners against newbies Kenya Police at the Utalii grounds.
In other matches, Posta Rangers played to a one-all draw against Nairobi City Stars with Bidco United registering the same scoreline against Nzoia Sugar at Thika stadium.
Back at Kasarani, unbeaten Gor Mahia have occupied top position in the league after winning all their four matches with 12 points despite playing less matches.
Ulimwengu netted the solo goal to earn them maximum points at the Kasarani stadium