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2009–10 Bayer 04 Leverkusen season

season of football team

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionNov 29, 2025
Entity authorityQ3637092 ↗
Source-derived summary

The 2009–10 Bayer 04 Leverkusen season happened between 31 July 2009 and 8 May 2010. Bayer Leverkusen participated in the Bundesliga and DFB-Pokal.

Season overview

August

Bayer Leverkusen started the 2009–10 season on 31 July 2009 in the DFB-Pokal. Bayer Leverkusen defeated SV Babelsberg 1–0 in the first round on 31 July 2009. Eren Derdiyok scored the only goal of the match. Bayer Leverkusen's opening match of the Bundesliga happened on 8 August 2009 against 1. FSV Mainz 05. The match finished in a 2–2 draw. Eren Derdiyok and Stefan Kießling scored for Bayer Leverkusen. Tim Hoogland and Daniel Gunkel scored for Mainz.

Editorial summary

This brief starts where responsible research should: with the source description of “2009–10 Bayer 04 Leverkusen season” as season of football team. Everything that follows is an evidence route, not borrowed authority.

Editorial reviewA dependable orientation record for establishing vocabulary, names and a first evidence trail. The current lead gives the account dated anchors—2009, 2010—that can be checked directly. The selected authority fields contribute no independent date. The account is most persuasive where Bayer, Leverkusen and season can be independently traced.
Editorial analysis

Why this record matters

The subject matters to the general reference register because the source frames it as season of football team. Its deeper value depends on whether names, dates, institutions and citations support that framing.

Evidence profile

Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Nov 29, 2025. The linked authority identifier is Q3637092. The first chronological checks are 2009 and 2010.

Critical limits

Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.

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Source & attribution

This entry incorporates text from “2009–10 Bayer 04 Leverkusen season” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.