"For me what these games have given Mikael is the knack of putting the ball in the back of the net," Bertschin told Birmingham's website. "He's enjoying playing because he loves to score.
"He's only human so he misses a few as well but he's in a position now where he's getting goals.
"He's a super build and very strong and he sometimes just needs to make that count a little bit more.
"Considering all the stuff he's had in the past and the fact that he's just recovered from a hernia operation it will help his confidence levels no end.
"His hernia problem has completely settled down and he looks like he's moving freely and he's competitive.
"I think it will play him into consideration for the first team."