The Norway-based striker went through the first three games of the competition without scoring, but came to life against South Africa, hitting the opener before setting up two goals for strike partner Ransford Osei.
The performance helped lift the pressure off Adiyiah amidst calls for him to be benched.
“People said a lot of things and some got to me, but the team was winning, so I was not spending time thinking about scoring once I was playing crucial roles in the team,” Adiyiah told KickOffGhana.com.
“The South Africa game was easily my best individual performance and my hope is that I can take that same performance into Sunday’s final against Cameroon,” he added.
Adiyiah has seen at firsthand the influence of the U-20s in shaping the careers of many big-name Ghanaian footballers, something which will drive him for Sunday’s final.
“Cameroon will be a much better team than they were in the first group match, so it will be a lot difficult, he said. But we play with our minds and can handle them.
“It will mean a lot to return to Norway as an African Youth Champion because it will be a good addition to my resume. It could even lead to better things soon.”