Speaking after the match, Mngqithi said: "We were unfortunate because we conceded the goal when we were getting closer to scoring and they were losing momentum.
"But credit to my boys and to Sundowns who played quite well. But it was a brilliant set-piece goal by Thamsanqa Sangweni," the former AmaZulu mentor said.
"We knew they [Sundowns] were getting a bit agitated and we wanted to push them a bit, but we should have capitalised right then and it was not to be."
Mngqithi had to make do without several of his players due to administration hold-ups.
"I do have quite a number of players who could not play today because of paperwork.
"All my foreigners were not here because of paperwork issues, so I believe we have a very solid team for the season ahead."