Yet to sign a new deal with Schalke beyond June 2018, 22-year-old Goretzka is on course to become a free agent and will be eligible to formally meet with suitors with a view to signing a pre-contract agreement when he enters the final six months of his deal on 1st January.
As yet, the player, who was joint top scorer at the 2017 Confederations Cup during the summer, remains undecided about what he should do next.
"I have to find out for myself what the next step should be. I have to consider a million things. I am a person who is very meticulous in such decisions. I play through all the scenarios. So I need time," he explained to reporters in Germany this weekend.
"There isn't a deadline, but I think we are in the final phase. The final decision will be made in January," Goretzka added.
My opinion of Leon Goretzka yesterday: Who?— Nooruddean (@BeardedGenius) December 2, 2017
My opinion of Leon Goretzka today: Young, tall, technically gifted, can play as a 6 or an 8, father was an automotive engineer, Aquarius so honest, open and imaginative, free in the summer - United can't afford *not* to sign him
Goretzka has been with Schalke since 2013 when he joined the club as a teenager from hometown team Bochum. He has been playing regularly ever since and has made over 120 senior appearances for Schalke.
He was selected in Joachim Low's 30-man provisional Germany World Cup squad while still uncapped at senior international level in 2014. He made his debut in a pre-tournament friendly against Poland, but missed on the final squad that lifted the World Cup a few weeks later.