The 24-year-old caught had a good season for Borussia Monchengladbach last term scoring six goals in 23 Bundesliga appearances.
The winger is claimed to be open to a move away to guarantee more regular first-team action with reports claiming there is a trio of Premier League clubs all keen on landing him this summer.
Leicester have been tracking the Belgian for a while now, but West Ham and Stoke are said to have just joined them in the chase. Hazard is under contract until 2019 so Gladbach knows that now would be a good time to sell if they wish to pocket maximum value for him.
Reece Oxford has recently Borussia Mönchengladbach for a season and it is hoped that the recent negotiations for the loan could help if the Hammers if they decide to make a move.