(CNN) -- St. Pauli and Kaiserslautern both won on their return to the German Bundesliga on Saturday, while last season's runners-up Schalke and fellow title hopefuls Werder Bremen suffered defeats.
Schalke saw champions Bayern Munich open their account with a 2-1 victory against Wolfsburg on Friday night, but Felix Magath's team went down by the same scoreline at Hamburg as Ruud van Nistelrooy won the battle of former Real Madrid strikers.
Magath threatened to quit the club during the week after being criticized by fans, and his much-heralded new signing Raul made little impact as the veteran Van Nistelrooy grabbed the headlines with both goals to follow up last weekend's German Cup hat-trick.
The Dutchman hit the bar with a fierce free-kick just before halftime and twice put Hamburg ahead to give former Wolfsburg coach Armin Veh a winning start to his tenure, with Schalke reduced to 10 men in the second half when Benedikt Howedes was sent off. CNN
