Bafana Bafana international Coetzee is making progress with the foot injury that was blamed for his failed move to Scottish giants Glasgow Celtic in August.
The 20-year-old, who instead joined Sundowns on transfer deadline day from Ajax Cape Town, recently shed his moonboot.
Madisha, 22, is enjoying his breakout season at Downs this campaign after impressing in the MultiChoice Diski Challenge.
Mosimane gave an update on his injured players after his team's 3-1 win over Orlando Pirates in midweek. The Brazilians next face ailing champions Bidvest Wits on November 21.
“I think that [Yannick] Zakri will be back,” Mosimane told the club's website.
“[Cuthbert] Malajila has gone under the knife, I don’t think that we should look at him. Mogakolodi Ngele got his work permit. Hopefully he will also come. When I see a free-kick like the one Marc van Heerden scored, I know that I have someone who can deliver those balls. Rivaldo Coetzee has taken off the moon boot. Ricardo Nascimento is also coming back in January. Those are very good defenders. We haven’t been playing well from the back.
“Bangaly Soumahoro played well. Motjeka Madisha is young. He has a lot of energy. He needs to learn a little a bit from Nascimento on organisation. He has a big heart. You can see he is a young stallion. We have a very good prospect for South Africa in Rivaldo and Madisha. I think that they are going to lead the team in the future.”