Berg was called-up regularly during Sweden's 2010 FIFA World Cup qualifying campaign. He scored his first goal for the team on 10 June 2009 in the 4–0 home win over Malta. He was on the score sheet also in the final match day against Albania, netting the second in an eventual 4–1 home win, which was not enough to secure Sweden a place at the tournament. With 2 goals, he was Sweden's joint second top goalscorer along with Zlatan Ibrahimović and behind Olof Mellberg.