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WATCH: Nazi-era anthem sung accidentally ahead of Fed Cup match, US tennis chiefs apologise - Eurosport
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US Tennis says sorry for using Nazi-era anthem before Germany Fed Cup match | Fed Cup | The Guardian
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US Tennis Association apologise after a Nazi-era national anthem was accidentally sung before Federation Cup match against Germany | The Sun
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US Tennis apologises after playing Nazi-era German anthem at Fed Cup tie: Watch six other occasions when anthems at sports events have gone wrong - Sport360 News
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Shocking moment Nazi-era German national anthem sung by accident at tennis tournament - Irish Mirror Online
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Fed Cup: German NAZI national anthem gaffe sung at Andrea Petkovic and Alison Riske match | World | News | Express.co.uk
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