SuperSport lost 2-0 to Cape Town City in their first league game of 2018/19, but have responded with 1-0 victories over AmaZulu and Bidvest Wits either side of edging Orlando Pirates on penalties in the MTN8 quarter-finals.
"I'm happy because I see progress in the team," Tembo said after his men beat log leaders Wits at Bidvest Stadium on Saturday.
"From day one we had a false start against Cape Town City but since that game we have been improving as a team, and I'm very happy about that.
"We are playing as a unit and we are playing well as a team. We had a few chances, only the final pass especially in the final third [needed improvement]."
Tembo added that the victory against the Clever Boys has boosted their confidence for the first leg of their MTN8 semi-final against Kaizer Chiefs at Lucas Moripe Stadium on Sunday.
"It's a morale-booster. I think it gave us a a little bit of less pressure in terms of us preparing for the MTN8, and after that we play Chippa United.
"We are trying to put more emphasis in league matches as well, as we don't want to see what happened to us last season," he said, referring to their fight against relegation last term.
Tembo was earlier this month appointed permanent head coach of Matsatsantsa, having initially been handed the reins in an interim capacity following Eric Tinkler's exit in March.