The Swedish international has been linked with PSV and Ajax recently.
“I’m not sure if I want to play for another Dutch side. I really have to think about it if PSV or Ajax opt to make an offer for me,” Berg told Sportweek.
“I’m not sure about what will happen in the winter. It’s up to Groningen to decide if they want to let me go if a team makes an offer. I definitely want to give it a try if a big club comes up.
“It’s my dream to play for Barcelona. That’s not yet a realistic option, but it’s allowed to have dreams and you’ll never know what happens in the future.”