Swansea City boss Brendan Rodgers hopes to keep hold of their on-loan players.
But Rodgers is hopeful of bringing the pair back to south Wales next term, having reportedly had a bid to make Sigurdsson's move permanent rejected.
"The season has finished and it's about planning going forward.
"In football terms the squad will break up as players will leave and players will come in.
"I will speak to Tottenham on Steven Caulker, he has been incredible for me this season at just 19 years of age.
"With Gylfi, we will have talks with Hoffenheim over the course of the next week or so.
"That's the challenge for me, recycling the squad, retaining that hunger and giving the players help."