Mario Gotze has been advised to join Liverpool to revive his career.
Gotze returned to Borussia Dortmund from Bayern Munich in 2016 and has struggled with injuries and illnesses.
"Maybe it'll do him a world of good to leave Bundesliga in the winter, move abroad where it's all a bit quieter and where he knock his career into shape again," Kevin Grosskreutz told Sky.
"Jurgen Klopp knows him well. He'd be a good fit at Liverpool."