The Ghana international, who spent last season at Vitesse, is wanted by the Toffees but the Stamford Bridge side want to guarantee the winger will be afforded first-team football
Everton's move to sign Chelsea and Ghana winger Christian Atsu on a season-long loan deal has stalled.
Atsu was brought up in conversation between the Merseyside club and the Stamford Bridge outfit during negotiations over Romelu Lukaku's £28 million move to Goodison Park.
Officials at Chelsea were understood to be keen for the winger to work with Roberto Martinez after Lukaku enjoyed a prolific 2013-14 season in front of goal under the former Wigan boss.
But the west London club want assurances that Atsu will play regular first-team football next season if he is loaned out - something Everton are unable to guarantee.
A number of other Premier League clubs are also keen to loan Atsu, who spent last season in the Netherlands with Chelsea's partnership club Vitesse.
The 22-year-old also went to the World Cup with Ghana, and started each of the African side's three group games.