The Albania striker has scored nine goals in all competitions on-loan with Southampton - with his six league contributions making him the third top scorer at the club this season.
Goal says Newcastle, West Ham and Southampton are all interested in signing Broja on a permanent deal.
Last week, Thomas Tuchel expressed his desire to bring Broja and fellow loanee Conor Gallagher, of Crystal Palace, back to Chelsea for pre-season - but offered no guarantees over a long-term plan for either.
Tuchel said: "First of all, they will come back because they are our players. When we give them on loan, we do this for them but also for us to have better, more experienced players back.
"They are our players and I want to have them in pre-season and then we decide what's going on."
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