On working with the Friends star, Evans had said: "The overriding thing that hit me first was how much he's prepared to work to make the job a good job. He never looks at his watch or says 'Can we go?'."
It is not known who will replace Evans at the head of the show, although there has already been speculation about the likely line-up for second series of the new incarnation of the programme.
Le Blanc and the rest of the team, racing driver Sabine Schmitz, YouTube star Chris Harris, Formula 1 pundit Eddie Jordan and motoring journalist Rory Reid understood to be staying with the show, with the highly-regarded Reid and Harris in line for a more prominent role.
Last week, rumours swirled that Le Blanc was planning on quitting the programme unless Evans left the show, and the veteran host was said to have become jealous of praise heaped on newcomers Harris and Reid - whose screen-time was boosted after positive feedback from viewers.
On Thursday, reports claimed that Evans may be in hot water as Kate Phillips, the BBC's incoming entertainment head, had allegedly summoned him for emergency talks over his bad behaviour.
Meetings were said to have been scheduled for later this month, after the broadcaster had analysed worldwide viewing ratings.
Perry McCarthy, who portrayed Top Gear's The Stig in the first two series of the BBC Two show, has said he expected Chris Evans to quit after constant criticism.
"It's sad for Chris," he told BBC News. "But personally I was actually expecting such an announcement."
The former racing driver added: "I wasn't expecting it this quickly, but I did think Chris would step down from it."
When asked why he believed Evans would leave Top Gear, McCarthy pointed to the mixed reaction directed at the BBC Radio 2 DJ.
He said: "Chris is an enormously popular radio presenter and TV show host etc, but he hasn't quite gelled with this show and he's not really gelling with the viewers.
"It must be a little bit painful for him to receive this reaction from everybody. I don't think he'd want to continue. I probably wouldn't want to continue if I was getting constant criticism either."
Overall, the show has failed to reach the viewing figures of the last series with Jeremy Clarkson, Richard Hammond and James May at the helm.
The popular former Top Gear trio bowed out with 5.8million viewers.
The new presenting team joined after the old team left following a fracas between lead presenter Clarkson and a producer over hot food.
Clarkson, Hammond and May will debut their new motoring show The Grand Tour for Amazon Prime in the autumn.