Robin Knoche's goal 15 minutes from time ensured Wolfsburg kept their place in the Bundesliga after beating Holstein Kiel 4-1 on aggregate.
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VfL Wolfsburg got off to a great start in their Bundesliga relegation-promotion playoff, beating second-tier Holstein Kiel 3-1 on Thursday.
The German Football League denied Holstein Kiel a licence to play in their 10,000-capacity Holstein-Stadion should they win Bundesliga promotion.
Relegation-troubled Cologne have appointed Markus Anfang as coach for next season, when the club will most likely be playing in the second division.
Eintracht Frankfurt were among eight German clubs from the upper three tiers hit with fines amounting to a total of €195,750 for fan misbehaviour.