THREE second-half goals saw Chelsea ease to a 3-0 victory over Bolton Wanderers in the Premier League and lift the pressure on Andre Villas-Boas.With Roman Abramovich watching in the stands, Bolton frustrated the home side in a first-half of few chances, Adam Bogdan making a particularly impressive save to deny Daniel Sturridge.But soon after the restart Chelsea were in front, David Luiz with a marauding run forward from defence, curling a sumptuous effort into the far corner from just inside the area.Nigel Reo-Coker then dragged an effort narrowly wide for Wanderers but it was 2-0 soon later, Didier Drogba nodding Frank Lampard’s corner into the net from close range.Lampard then got his name on the scoresheet, finishing well at the far post to seal the victory following an excellent cross from Juan Mata.Villas-Boas recalled Lampard, Ashley Cole and Michael Essien, who were controversially left out of Tuesday night’s Champions League defeat at Napoli, sparking further reports of dressing-room unrest.The Chelsea boss stood by his Naples line-up, insisting it was picked purely on footballing reasons, but he admitted on Thursday he was forced to explain it to owner Abramovich.That merely fuelled speculation Villas-Boas was on borrowed time at Stamford Bridge, with the club’s season in danger of unravelling completely.