Joseph Brain believes Cameroon will upset defending champions Nigeria in their Africa Women Cup of Nations semi-final tie in Accra on Tuesday.
The Indomitable Lionesses will be meeting the Super Falcons for the 12th time and are desperate to avoid a 10th loss following back-to-back Awcon final defeats.
And the former Cameroonian international, who is in his first national team coaching assignment, is poised to lead his ladies to title glory for the first time, beginning against the eight-time winners.
"In 2016, I wasn't the coach of the team but I was a Cameroonian. So, I saw everything," Brain said at a pre-match conference on Tuesday in Accra.
"You don't need to be in the team to know what happened or what transpired. Once you're part of football, you ought to understand what happened on that day. We want revenge. We want to avenge past pains they cost us.
"Now, we have players who understand the game, learned a lot over the years. A lot of mistakes were made in the past. These are some of the mistakes we will make sure we correct them going into this battle and also do something extraordinary.
"We know Nigeria is a force to reckon with in women's football in Africa. And now that they have won nine times against us, it tells a lot but one-day things will change.
"We have been playing here [Accra] and the atmosphere has been good for us. Concerning our preparation for this match, it is not different from other previous we've played. We are hopeful that what So, I don't think anything will change. Hopefully [on Tuesday], we will do our best."