He also says Manchester United are working 'very hard' to secure a deal for Sancho.
However, Dortmund are hopeful of keeping the 20-year-old for another season after the suspension of the season due to the coronavirus pandemic.
"Re: Sancho. Price: 130 million euro. Man UTD working very hard to get him," Fjortoft tweeted.
"Liverpool still most likely destination. But have to sell either Mane or Salah. New is that Dortmund see this stop of the season as a chance to keep him another season."