Hamburg have appointed Markus Gisdol after coach Bruno Labbadia was sacked for a second time following a poor start to the season.
Pierre-Emerick Aubameyang struck twice as Borussia Dortmund beat Wolfsburg 5-1 to go top of the Bundesliga, while Hamburg lost to Freiburg.
Bayern Munich opened up a two-point advantage at the top of the Bundesliga after a 3-1 win over Ingolstadt on Saturday.
Leipzig picked up a first Bundesliga win in their maiden home fixture with a 1-0 win over Borussia Dortmund, while Leverkusen beat Hamburg.
Borussia Dortmund respond to Bayern Munich with opening day win thanks to Pierre-Emerick Aubameyang's double.
Hamburg supporters have started a petition to sign Wigan Athletic and Northern Ireland forward Will Grigg.
United States forward Bobby Wood is to join Hamburg from German second division side Union Berlin this summer.
Bayern Munich were held 1-1 at home by Borussia Moenchengladbach on Saturday as Borussia Dortmund kept the Bundesliga title race alive.
Borussia Dortmund recovered from their shock Europa League defeat to Liverpool with a 3-0 win over Hamburg in the Bundesliga.
Bayern Munich remain on course for a record-breaking fourth successive Bundesliga title with a 3-1 victory at Stuttgart.
Bayern Munich maintained their lead at the top of the Bundesliga with a hard-fought 1-0 win at home to Eintracht Frankfurt.
Borussia Dortmund kept up the pressure on Bayern Munich at the top of the Bundesliga on Sunday with a 2-0 win over Mainz.
Hannover ended an eight-game losing streak and gave their hopes of Bundesliga survival a boost with a 2-1 win at Stuttgart on Saturday.
Bayern Munich came from behind to beat Darmstadt 3-1 and move 11 points clear at the top of the Bundesliga.
Robert Lewandowski's clinical finishing steered Bayern Munich to a 3-1 win at Bavarian rivals Augsburg.
Darmstadt edged away from the Bundesliga relegation zone with a 2-0 win over struggling Hoffenheim on Sunday.
Crystal Palace are bottom of the Europe-wide form table - and only one Premier League team makes the top 10.
Hamburg are interested in signing Leicester's Gokhan Inler on loan, according to Sky Germany.
Bayern Munich pulled 11 points clear of Borussia Dortmund at the top of the Bundesliga with a 2-1 win at Hamburg.
Bayern Munich made it a record-breaking first half of the season with a 1-0 Bundesliga win over Hannover .