The German youth international has had a torrid time with injuries this season.
It is expected that Sunderland will be active in the summer transfer window.
Leeds United boss Steve Evans was once odds-on to be Peterborough United's next manager.
Ally McCoist has suggested that Newcastle United should look at West Ham United and Southampton for ambition.
Everton sacked Roberto Martinez yesterday, after enduring a disappointing season.
Tottenham Hotspur and Newcastle United will face each other in the Premier League this weekend.
Aston Villa have been the worst team in the Premier League by some distance this season.
The loanees are both set to leave the club at the end of the season.
Newcastle United will play in the Championship next season.
Will Mikel Arteta take up a role with Manchester City?