Aston Villa have been put on red-alert after Schalke told Anthony Annan to look for a new club.
The 26-year-old has not featured in any pre-season games for the Bundesliga club and a summer switch looks inevitable.
Annan was loaned to Vitesse Arnhem last season and the Dutch club are also keen to secure his services again.
However, the Ghana international admits there has been some interest in him and is optimistic about his future.
"I have not been called up for any pre-season games - it's embarrassing," he told Skysports.com.
"There has been some contact from clubs but I have two years on my contract with the German club, so we will have to see what happens."
Paul Lambert is apparently a fan of the combative midfielder who would bring his energy and industry to the Villa midfield.