The club will receive big money from the sale of the Belgian in particular, and their former captain has urged them to reinvest those funds quickly.
Former Aston Villa skipper Martin Laursen has told talkSPORT on Saturday's Weekend Sports Breakfast that the club must spend the money accrued from the sales of Christian Benteke and Fabian Delph to Liverpool and Manchester City respectively.
The latter completed a move to City on Friday, despite having previously stated his intention to remain at Villa Park - on the club's official website.
Striker Benteke is expected to leave as well, with the BBC among those to report that Liverpool have activated his release clause after months of speculation linking him with a move to Anfield.
That would see Tim Sherwood lose two of his star performers ahead of the upcoming campaign, and Laursen says the club must give him the money to spend in order to find suitable replacements and appease supporters.
“The important thing now is getting new players; it’s where they have struggled for the last three seasons,” he told talkSPORT.
“You’re not certain to do well if you sign new players but it gives you a better chance. They have to spend the money to give something back to the fans. They can’t just sell their best two players.”
A similar situation in the future
The former defender also says that the club may face a similar situation in the future with other players, such is their standing in the Premier League.
The club were once regular top-six finishers in the league under Martin O’Neill but have struggled in recent seasons as owner Randy Lerner has tightened the purse strings, with former manager Paul Lambert forced to opt for youth instead.
And Laursen believes that players will always consider an exit should the big clubs come calling.
“It’s hard, Aston Villa is a big club but has not done well for a couple of seasons,” he added.
“It’s also a club that’s not as big as the big clubs. If a player has the chance to move to a big club, he will consider moving away from Aston Villa.”