Steve Bruce has confirmed he had a training ground bust-up with Matt Ritchie and has now launched an investigation to find what he believes is a mole inside his training ground.
He also denied leaking a story himself about goalkeeper Karl Darlow being dropped last week and said he would resign had he done that.
Earlier this week, Sportsmail exclusively revealed that Bruce was involved in a row with Ritchie in training, with the winger branding his manager a 'coward'.
Asked about the incident in his pre-match press conference on Friday, Bruce said: 'There is no denying I had a row with Matt Ritchie.