The 23-year-old has been a hit in Norwegian football and has caught the eye of some of Europe’s biggest clubs.
Annan has been compared with Ghana national team-mate Michael Essien.
“Essien is a top player, to be (compared) alongside him is amazing,” he said.
“He has everything, class, power, touch, stamina, what a player, to compare him to me? People are crazy. I learn a lot alongside him, he is simply awesome.
“To me, to be followed by Arsenal and Man United, they are two great teams. I just won the league here. Let me enjoy it and we will see in the future.”