England captain Dylan Hartley has "let his country down" after being shown the third red card of his career, according to head coach Eddie Jones.
The Northampton Saints hooker is serving a six-week ban for catching Leinster's Sean O'Brien with a swinging arm in a Champions Cup match earlier this month.
Hartley, 30, has now accumulated a total of 60 weeks in suspensions, but is available for England's Six Nations defence.
"This is not the last chance for him but he understands he can't behave in the way he did," Jones told The Telegraph.
"Dylan will be more disappointed than anyone about what has happened. He has got to cop the penalty because the World Rugby directive on protecting the head is 100 percent right.
"He has let down himself, he has let down his club and he has let down his country."
Hartley was dropped from the World Cup squad last year under former head coach Stuart Lancaster after he headbutted Saracens hooker Jamie George.
