Chelsea soccer manager André Villas-Boas admits Wednesday's Champions League clash with Germany's Bayer Leverkusen is a "massive game" as he looks to ease the pressure after a sting of poor performances.

Villas-Boas is the man under pressure in the English Premier League (EPL) after the London club lost three of its last four games and fell 12 points behind leader Manchester City.

Russian billionaire owner Roman Abramovich has a reputation for ruthlessly dispensing with underperforming coaches, and Villas-Boas said his team needs to win -- now.

"The most important thing is finding winning ways straightaway -- if possible against Bayer Leverkusen in the Champions League. That is a massive game," the Portuguese said. "Then we have three games in the Premier League where we must try to get nine points. The challenge is to have the belief and strength to fight for those nine points."

Despite all the gloom surrounding Stamford Bridge, Villas-Boas insisted he believed the players could turn things around.

"It looks bad for us at this moment," he said. "It has not been the brightest of starts -- the worst for quite some time -- but we have to have belief and believe in the work to get back to winning ways. The players have immense talent, and I believe in them."

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