BERLIN (AFP) - Having hit his 11th goal of the season and his eighth in six games, Hertha Berlin striker Andrei Voronin says his side are growing into their role of league leaders and becoming hard to beat. Following his hat-trick against Energie Cottbus the week before, Voronin struck again as Hertha beat Bayer Leverkusen 1-0 at Berlin's Olympic Stadium on Saturday in front of 58,753 to keep a four-point lead at the top of the league. Voronin's goal on 50 minutes came with some good fortune when Leverkusen goalkeeper Rene Adler went to kick the ball away only to see his effort deflect off Voronin's chest and into his own net. "It was a great feeling to celebrate with the fans after the goal," said Voronin, who is on loan until June from Premier League side Liverpool. "Still many opponents want to stop us, but unless they are in top form they don't succeed. "But my goal did have a bit of luck." After their record-breaking Champions League performance last week, when they hammered Sporting Lisbon, Bayern Munich stay second in the league, four points behind Hertha, after sealing a 3-0 win at ten-man Bochum on Saturday. "That was a first-class performance, very focused and very commanding," said Bayern coach Jurgen Klinsmann. "The team concentrated throughout. "We wanted to keep the ball moving at speed. "We took a little while to get going, but it steadily improved after that. "It was certainly impressive by the end and the lads deserve praise for that. "We know Hertha have won and the gap has remained the same, but we'll continue to apply pressure at the top." Goals by midfielder Ze Roberto, plus defenders Philipp Lahm and Martin Demichelis gave the defending Bundesliga champions three points. "It was an emphatic victory, we took control of the match after going a goal up, and it got even easier against ten men. "We retained possession better, and our passing was better. "That's how you stop your opponents creating chances." Bayern face a considerable test in their quest to retain their Bundesliga title when they travel to face Wolfsburg - unbeaten at home this season - in a fortnight. Wolfsburg went third in the table, level on points with Bayern, when they beat Schalke 04 4-3 on Friday night after Brazilian Grafite scored a hat-trick.