Atletico Madrid are interested in bringing Diego back to the club in January, according to his agent Jose Maria Martin.
Brazil international Diego was on loan in the Spanish capital last season and helped them to secure the Europa League title, scoring as they defeated Athletic Bilbao in the final.
And Martin has claimed the former playmaker could return to the club from Wolfsburg in the next transfer window.
"Diego's father has received a call from Atleti. Wolfsburg are having a dreadful season and have fired (coach Felix) Magath," he told Punta Pelota.
"At Christmas, or at the end of the season, Diego could sign for Atleti. His family like the idea.
"Diego Simeone is very insistent about it. The coach thinks that, with the Brazilian, he would have a squad to aspire to everything."
Atletico are unbeaten domestically this season and sit joint top with Barcelona on 25 points after nine games.