Mamelodi Sundowns of South Africa failed to build on a great start to their CAF Champions League title defence .
Mamelodi Sundowns of South Africa won only 2 - 1 at home to KCCA of Uganda Friday .
Mamelodi Sundowns of South Africa failed to build on a great start to their CAF Champions League title defence and won only 2 - 1 at home to KCCA of Uganda Friday .