Some Leeds United supporters have given their thoughts regarding the 22-year-old's situation at Elland Road.
Rangers legend Johnstone does not want to see the Gers become complacent.
The German youngster has plenty of admirers.
The Magpies travel to the Etihad on Saturday.
Tottenham Hotspur drew 1-1 with Monaco on Thursday, with Erik Lamela netting Mauricio Pochettino's side's goal.
Dusan Tadic made a slow start to the season with Southampton.
Celtic fans were impressed by Kieran Tierney's display against Fenerbahce in the Europa League.
West Ham boss Bilic wants to create a culture of youth football at the Boleyn Ground.
Sheffield Wednesday have won their last three games in all competitions.
Manager Tim Sherwood has provided a fitness update on his squad ahead of weekend's meeting with Stoke at Villa Park.