Aston Villa have reportedly been put under pressure to raise £50m through player sales across the next two transfer windows.
The Villans are embarking on a cost-cutting drive after falling short in their target of reaching the Premier League this season.
Grealish is a rumoured £15m target for Tottenham Hotspur, but separate reports suggest that Villa want double that amount for their most in-demand asset.
Villa, beaten by Fulham in last month's Championship playoff final, are also said to be hoping to raise £10m from Chester's sale and a similar amount for Kodjia.
The report suggests that the Midlands outfit have so far lowered their wage bill from £60m to £45m after offloading John Terry and a number of loan players.