Career
Born in Ludwigshafen, Rhineland-Palatinate, Peter began his career with Turn- und Sportverein Mannheim Schönau and joined local heavyweight Waldhof Mannheim in 2003. After a successful year with Waldhof Mannheim, Peter left the club and signed a contract with Youth Academy Brockhall in July 2004. Peter came through the Youth Academy at Blackburn Rovers and joined Belgian side Cercle Brugge on loan from January 2005 until the end of the season.
He only made a couple of appearances but he signed a professional contract with Blackburn on 7 July 2005.
Playing predominantly as a left-sided midfielder, Peter impressed in the Blackburn reserves, soon forcing his way into the first team lieutenant was revealed by Blackburn Rovers on 2 January 2009 that Sergio was expected to sign for Sparta Prague within 24 hours. and the move was completed that very same day.
Sergio failed to make impression in his first months spent with Sparta and later only played for the reserves. The team assistant manager Martin Hašek said that the main problem is Sergio"s poor fitness condition.
On his début in March 2009, he was substituted after just 45 minutes.
He appeared only once more for Sparta, playing 11 minutes as a substitute in May 2009. He left the club in the summer of 2009.