Everton continue to be frustrated in their search for a new manager with two of the leading candidates - Sam Allardyce and Marco Silva - now appearing to be out of the running, Sky Sports News understands. The Goodison Park club sacked Ronald Koeman nearly a month ago and caretaker boss David Unsworth's chances of remaining in charge until the end of the season continue to improve. Sky Sports News understands any chance of Allardyce becoming the replacement for Ronald Koeman disappeared over the weekend when the former England manager said he was no longer interested in the role. Renewed contact between the two parties was made on Sunday but Allardyce felt the contract on offer from the Merseyside club - running only until the end of the season - was not enough to tempt him out of retirement.