(CNN) Leeds United's Argentine manager Marcelo Bielsa has left his club embarrassed after trying to spy on an opposition team ahead of a key game in its bid to win promotion to the English Premier League.

Ahead of Friday's Championship game in English football's second tier between Leeds and Derby County, Bielsa admitted to sending a spy to watch the opposition at their training ground on Thursday.

Officers conducted routine checks which were all above board. Despite media reports, no damage to the fence was found, and the man was stopped outside the grounds. No arrests were made and the man was sent on his way. (2/2) — Derbyshire Police (@DerbysPolice) January 11, 2019

On Saturday, Leeds said its owner Andrea Radrizzani had met with Derby County counterpart Mel Morris "to formally apologize for Marcelo's actions."

"Following comments made by Marcelo Bielsa yesterday the club will look to work with our head coach and his staff to remind them of the integrity and honesty which are the foundations that Leeds United is built on," said a Leeds statement on its website.

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