Mauricio Pochettino is 'tripping himself over not to have a go at his players', says Martin Keown as he urges Chelsea manager to have 'harsh words' after 5-0 drubbing at Arsenal and blasts club's recruitment

Mikel Arteta 's side put the Blues to the sword at the Emirates with a devastating second-half display that saw them move three points clear at the top of the Premier League .