“[Giroud has gone], Tammy is rumoured to be leaving as well, they’re making space. Clubs now have to do that. Clubs are trying to abide by the rules. They have to move people out.
“For them to do that, they are planning a mind-boggling transfer, and I think it will be Haaland.
“Chelsea are going to offer big money for somebody and I suspect it would be him.”
Haaland joined Dortmund from Red Bull Salzburg in January 2020.
The forward has scored 41 goals in as many games during his time in Germany and has become one of the most sought-after players in Europe.