Bayern Munich forward Toni Kroos left the door open for a switch to the Barclays Premier League in the summer.
Tim Sherwood claims the "silence is deafening" from the Tottenham board amid speculation he could be replaced as manager.
The Pilgrims are currently in the relegation zone, announced the news on their official website.
They have been without a boss since they sacked Carl Fletcher on New Year's Day.
Sheridan has previously been in charge at Oldham and Chesterfield but has been out of work since the latter relieved him of his duties back in August.