Coach of Cameroon national team Clarence Seedorf has a major concern ahead of their AFCON 2019 Round of 16 fixture against Nigeria.
Cameroon have not conceded a goal after three matches in the group stages, but the Indomitable Lions have scored just two.
Cameroon is not alone in this challenge, as the Super Eagles have a worse case - have scored two goals and conceded two.
"We have to improve in several details, especially in attack, we have to be smarter to create more opportunities, we have not conceded a goal yet, there are positive things for the future."
The Super Eagles have not lost to Cameroon in regulation time since they were beaten 1-0 in a World Cup qualifier in August 1989.