One Hamburg SV fan suffered "life-threatening injuries" and 19 more were seriously injured in celebrations after the team's return to the Bundesliga, local fire services said on Sunday.

Fallen German giants Hamburg won automatic promotion to the Bundesliga after a seven-year absence with a 6-1 home thumping of lowly Ulm on Saturday. The victory took Hamburg one point clear of Cologne atop the Bundesliga 2 table.

Six-time German champions Hamburg SV earned a triumphant promotion back to the Bundesliga after a seven-year absence, with Saturday's 6-1 demolition of Ulm guaranteeing them a top two finish in the second division with a game left to play.