Flying Dutchman Arjen Robben celebrated his Bayern Munich debut in sensational style on Saturday when his two second-half goals sealed a 3-0 win over defending Bundesliga champions Wolfsburg. Having only signed a four-year deal with the German giants having left Real Madrid on Friday, the Holland star came on just after half-time and made an early impact when fellow second-half substitute Franck Ribery put him clear on 68 minutes. Robben beat Wolfsburg defender Andrea Barzagli to curl his shot wide of goalkeeper Diego Benaglio. Ribery set up Robben again on 80 minutes as the defending champions were comprehensively out-played. Robben, who cost Bayern 26 million euros, and Ribery gave their club their first win of the season in four attempts after Bayern were humiliated 2-1 at minnows Mainz last week. The victory at Bayern's Allianz Arena lifts the Bavarians up from 16th to seventh and eases the pressure on coach Louis van Gaal who took over in July. The win was also sweet revenge after Wolfsburg humbled Bayern 5-1 in April. Bayern went ahead in the first half when midfielder Hamit Altintop smashed his shot at Benaglio, who parried the ball into the path of Germany striker Mario Gomez who fired home on 28 minutes. The defeat leaves Wolfsburg sixth after their second consecutive defeat while Bayer Leverkusen stay top thanks to Germany-reject Steffan Kiessling hitting a second-half winner to seal a 2-1 win over Bochum. Germany coach Joachim Loew has found no place for Kiessling in his squad for next Saturday's friendly against South Africa or the World Cup qualifier against Azerbaijan on September 9, but the Leverkusen star reponded in style. His 68th-minute strike was enough to give his side the win which gives them a three-point lead over second-placed Hamburg, who play Cologne on Sunday when Hertha Berlin also host Werder Bremen. 'We deserved the win,' said Leverkusen coach Jupp Heynckes. 'But we did make life a bit difficult for ourselves. 'In the first half, we veered between good and very good, we worked hard for our many chances. It speaks volumes for the team that we came back from being 1-0 down. 'The team has shown they have the absolute will to decide games.' Leverkusen built on last weekend's 5-0 win over Freiburg with a win over Bochum as Manuel Friedrich scored for both teams. Leverkusen's ex-Germany defender Friedrich put Bochum ahead when he won a sprint against Cameroon midfielder Joel Epalle, but stabbed the ball into his own net on 32 minutes. To repair the damage, he scored with a header on 41 minutes before Kiessling's second-half winner. Leverkusen's teenage midfielder Tony Kroos found himself free on the right side of the penalty area and passed across for Kiessling to fire home from six metres out. Schalke 04 went down without a fight as they were shocked 1-0 at home to minnows Freiburg. Having hit the bar midway through the first half, Freiburg took the lead when South Korean defender Du-Ri Cha scored in the 40th minute with a right-footed strike. German magazine Kicker's website has reported Schalke's Brazilian defender Rafinha is being lined up by Bayern Munich for a last-minute switch to Bavaria before the transfer window closes on August 31 and the news seemed to have affected lifeless Schalke. Nuremberg held Stuttgart to a 0-0 draw while Dortmund drew 1-1 with Frankfurt. On Friday, Mainz were brought down to earth after their Bayern triumph when they slumped to a 2-0 defeat at Borussia Moenchengladbach. 