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It is an issue that perplexes many a fan and reporter that has covered any of Sheffield United's running battles with Norwich City over the last few seasons.

How can Chris Wilder and Daniel Farke get on so well away from the touchline?

On it, they have some brilliant running battles that are sometimes as entertaining as anything going on on the field. It was sparked in the Championship, when Wilder took exception to Norwich's timekeeping and how he was 'waved off', in his own words, when he was sent to the stands.

Chris Wilder set to resume friendly battle with Daniel Farke when Sheffield United face Norwich