( CNN ) -- Paolo Guerrero scored twice as Hamburg took over top spot in the German Bundesliga on goal difference from Bayer Leverkusen after a 3-1 victory against bottom club Cologne on Sunday . Paolo Guerrero celebrates after scoring his second goal for Hamburg in the win over Cologne . Leverkusen had gone three points clear on Saturday night with a 2-1 win against Bochum . Peru striker Guerrero netted the opening goal against visiting Cologne after being picked out by David Jarolim in the 19th minute . Bruno Labbadia 's Hamburg team needed until the 66th minute before doubling the lead , with Guerrero again giving goalkeeper Faryd Mondragon no chance . However , winless Cologne pulled one back with a spectacular long-range effort from substitute Adil Chihi before Piotr Trochowski 's late penalty wrapped up the points following a foul by Mondragon on midfielder Ze Roberto . Earlier on Sunday , Werder Bremen moved up to third on goal difference following a 3-2 win at struggling Hertha Berlin . Bremen joined Schalke and Borussia Monchengladbach on seven points after all five goals were scored in just over half an hour in the second period . Bremen midfielder Mesut Ozil squandered the best chance of the first half when he hit the post with just goalkeeper Jaroslav Drobny to beat , but made amends when he broke the deadlock from a similar situation 12 minutes after the interval . Tim Borowski doubled the lead on 74 after Drobny failed to hold a shot from Torsten Frings , then the hosts pulled one back with a 20-yard free-kick from Lukasz Piszczek . Naldo made it 3-1 with seven minutes to go when he headed home from a corner before Patrik Ebert smashed in a brilliant late long-range effort to set up a tense finish . Meanwhile , Hannover have appointed caretaker manager Andreas Bergmann as coach until the end of the season to replace Dieter Hecking , who resigned two weeks ago .
Bundesliga take top spot in Bundesliga on goal difference from Bayer Leverkusen . Cologne scores twice in 3 -1 victory at home to bottom club Cologne . Borussia Monchengladbach move up to 66th following a 3 -2 win at struggling Hertha Berlin . Bremen join Bayer Leverkusen and Borussia Monchengladbach on seven points .