With the Premier League champions currently lagging in sixth place — 11 points off the top four — Kroos hinted he might be willing to join a club outside of the Champions League next season.
"Much is possible," he told reporters when asked if he would be willing to forgo the chance to play in Europe's elite club competition next season.
When the subject of his future was raised further, Kroos said: "I have noticed that a lot has been written about it. There's nothing new. No decision has been made. There's no agreement.
"That will stay that way until the summer, then a decision will be made. It's no secret the Premier League is an interesting league."
Kroos has made 22 Bundesliga appearances this season, scoring once and providing four assists.