Du-Ri, who was with Freiburg last season, also spent spells at Eintracht Frankfurt, Mainz and Koblenz.
Mainz beat Nuremberg 1-0, Freiburg won 2-1 in Bochum and Borussia Moenchengladbach drew 0-0 with Stuttgart.
In Germany , Bayer Leverkusen returned to second place despite being held 0-0 by Freiburg on Saturday.
Fifth-place Freiburg overcame Werder Bremen 3-2 at the Weserstadion while Hamburg also won -- 1-0 against Monchengladbach.
Freiburg hit a consolation goal in injury time when Stefan Reisinger met a cross from Mohamadou Idrissou.
In their daily shopping, the good burghers of Freiburg are happy to reuse plastic bags again and again.
Julian Draxler put Schalke ahead in the first half but Jonathan Schmid leveled for Freiburg just after the break.
In Germany , Eintracht Frankfurt continued their impressive start to the season with a 2-1 win over Freiburg .
Mainz drew 1-1 with Werder Bremen while Freiburg were 2-0 winners against Monchengladbach.
Christian Dieckmann, a taxi driver from Freiburg, Germany, had taken a last-minute flight to Rome for Benedict XVI's farewell.
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European security issues were also expected to feature prominently at the Freiburg summit.
And Munich made sure of the three points when Freiburg's South Korean defender Du-Ri Cha scored an own goal.
An own goal from Julian Schuster saw Schalke ahead again and left Freiburg in fifth place in the final standings.
Hamburg's European hopes were hit by a 1-0 home defeat by Freiburg, which followed last weekend's 9-2 thrashing by Bayern.
In Freiburg they are not doing anything that is very unusual and much of the technology is tried and tested.
They moved through grade school together in Germany, to the economics department at Freiburg University and, later, to Margarete Steiff Co.
Nevertheless, the Freiburg star and his midfield cohorts should not be relied upon to score as many goals as genuine attackers.
On May 28, without warning, four of Peguform's executives who served on its management board declared Peguform insolvent in Freiburg municipal court.
By collecting the waste carefully and segregating it out, often by hand, Freiburg's recycling industry can find a use for most things.
In the German Cup, VfL Wolfsburg and SC Freiburg progressed to the semifinals after victories over OFC Kickers 1901 and Mainz respectively.
Defeat leaves Hertha still battling to avoid automatic relegation with 16th-placed Cologne who also lost on Saturday, going down 4-1 at Freiburg.
He returned to the Bundesliga with Freiburg last summer, and his consistent form saw him called up for last October's friendly with Senegal.
Meanwhile, Bayern has been drawn at home to face Wolfsburg in the German Cup semifinal, while Freiburg will travel to Stuttgart in the other fixture.
In his defence of classical monetary policy in the German city of Freiburg, Mr Weidmann also attacked the idea of shifting away from inflation targeting.
Bayern will now face either Stuttgart or Freiburg in the final.
It moved Freiburg above Frankfurt into fifth place on goal difference.
In Germany, at the hospital of the University of Freiburg, Mathias Berger has recently concluded the first controlled trial of its kind that suggests an answer.
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Stuttgart bounced back from the opening-day defeat by Wools to beat Freiburg 4-2 as summer signing Pavel Pogrebnyak netted the opening goal in the 53rd minute.
Celtic's new signing from Cardiff City, Joe Ledley, started in midfield, while South Korea international Cha Du-Ri, signed after he left Freiburg, came on as a substitute.
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