Everton reportedly tried to get Lukaku to commit to a new terms during the last two summer transfer windows, while Raiola claimed in December the deal was "99.9 per cent" done.
However, with no apparent progress made, speculation has been growing that the Premier League's leading goalscorer will swap Merseyside for west London in the summer.
Bookmakers have reacted to the news by slashing the odds on Lukaku leaving the Toffees, but Raiola has dismissed talk his client will leave Ronald Koeman's side.
There are no problems right now between the player and the club,"' Raiola told Sky Sports' Jim White during an interview on talkSPORT.
"Talks are ongoing. He will sign."