An awkward lunge on the intercept leading to Buchanan's own goal, and reward for percentage football, optimising how they capitalised on the moments where they found spaces to inflict hurt, led to Chiefs' 1-0 lead by the break.
As has been their trademark in 2021-22, Chiefs came out slugging to land an early blow.
When they did not, Amakhosi withdrew into a shell. They absorbed pressure in a period where a stray pass from Njabulo Blom allowed Sphesihle Maduna a low drive past the upright, and Thapelo Xoki's punt upfield found the run from Augustine Mulenga, under the attention of Daniel Cardoso, to squeeze a shot at Daniel Akpeyi.
Chiefs patiently waited for the rare moment of Usuthu being caught out of shape, and pounced. Blom's well-weighted pass saw Keagan Dolly down the right who squared in the direction of Kgaogelo Sekgota. Buchanan stretched awkwardly back for the intercept, and could only direct the ball past Veli Mothwa into his own net.
The two teams had chances in either direction from the break.
Defender Mbongeni Gumede's pass from the halfway line was allowed to run by two players to find the Thabo Qalinge's sprint down the left, who struck across the face. Sithebe's low skidding drive was hit with enough power to force an awkward parry from Akpeyi.