The 24-year-old has been continually linked with a move back to Stamford Bridge.
Antonio Conte is eager to bolster his strike force in the event Diego Costa, who is the subject of a big-money from Chinese Super League outfit Tianjin Quanjian, leave in the summer.
Lukaku has also been mooted as a target for Manchester United, however the Belgian hitman supposedly prefers to link up again with the Blues.
Despite originally having doubts about whether he would fit into Antonio Conte's system, the Everton striker is believed to have told his agent, Mino Raiola, to complete a deal.
Italian journalist Gianluca Di Marzio claims Lukaku has contacted Courtois to give him the lowdown.
He says a line of communication has been established between Lukaku and Chelsea.
The Toffees originally placed a £100million price-tag on the star, but could now accept £90m to let him leave Goodison Park.
Lukaku is winning the race to clinch the Premier League’s Golden Boot award, as he has 24 goals to his name.
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