The teenager was voted the Reds' Young Player of the Year in 2012 and is looking to make the step up to Warren Joyce's side after scoring during his only appearance for the Reserves last term - in the Lancashire Senior Cup win against Oldham in May.
Berg, who was at Old Trafford recently for the Red Heart United Legends game, believes his fellow Norwegian needs to grasp his opportunities and learn from any disappointments suffered last season, when he was less of a central figure in the Under-18s after Christmas.
"It'll be good to see him," Berg told ManUtd.com. "It's been a bit more difficult than it was in 2011/2012 so hopefully, next season, he can make the step up.
"With young kids, it's not a straight line in terms of developing - there are ups and downs and it's part of being a footballer and being a kid. You have to accept it and be patient - work as hard as you can and take the chances when they come along.
"He's getting a great football education and, if he goes on to play in the first team, it will be fantastic. If not, he will have an opportunity to play professional football elsewhere and that is the great thing about the United footballing education. These kids develop into good players.
"Of course, not everybody is going to play for the first team but they will play elsewhere and the security for him is knowing he's getting the right training to be a top player so I think it's interesting to see how he develops."