Tottenham pushed Leicester City for the title last season, but both lag behind Manchester United, Manchester City and Chelsea in next year's title odds.
The former Celtic and Newcastle United managers are thought to be on a shortlist for the Belgian club.
The Frenchman missed most of the 2015-16 campaign injured.
Who will be the next Leeds United manager?
The previously unknown Portuguese has the Owls on the brink of the Premier League.
Steve Evans explains what Leeds United need to do in the summer in order to succeed in the Championship next season.
Celtic announced Brendan Rodgers as their next manager last week.
Eric Dier joined Tottenham Hotspur from Sporting Lisbon in the summer of 2014.
Sheffield Wednesday are due to meet Hull City in the Championship play off final.
West Ham United are set to move into the Olympic Stadium next season.