Chelsea may allegedly look to generate close to £90m from the departures of five players later in 2020.
While the Blues are likely to be in a stronger financial position than many of their rivals due to their recent transfer ban, it has been claimed that club officials are looking to raise more funds for boss Frank Lampard.
According to Transfermarkt, Chelsea can realistically look to recoup as much as £89.3m if they are able to part ways with each player.
Palmieri and Alonso are valued at £21.6m and £18m respectively, with a combined total of £39.6m providing Chelsea with a significant chunk of the fee which would be required for Leicester City left-back Ben Chilwell.
Zappacosta and Bakayoko, on loan at Roma and Monaco respectively, are priced at £10.8m and £22.95m, despite their lack of future at Stamford Bridge.
Meanwhile, Batshuayi, who has been confined to the substitutes' bench for much of the campaign, may cost just £15.75m.