Carrick says Martinez hair-pull red card 'one of worst decisions I've seen'
Keane told Sky Sports: "I can see both sides. When you class this as violent conduct this seems really harsh. It is harsh but when looking at the laws you have to accept it.
" While Carragher added: "I think that is soft. He is going for the ball, trying to grab hold of something and he has got it for half a second... I don't think any football fan, any player is thinking that is a red card.
" Former Manchester United defender Gary Neville said on Sky Sports: "Martinez looks perplexed and confused: 'What have I done? ' "He's pulled his hair and that results in a red card, nowadays. He knows what he's doing there.
" Martinez was making his first Premier League start for United since a 1-1 draw against West Ham on 10 February, after recovering from a calf injury. It is the second consecutive league game in which United have had a defender sent off, after Harry Maguire saw red in the 2-2 draw at Bournemouth before the international break. "The after-effects could be serious," said BBC Sport's Manchester United reporter Simon Stone.
"Martinez will be banned for Saturday's trip to Chelsea . Maguire is expecting to find out whether he is going to get an extra game suspension for his red card. "If he does, 19-year-old Ayden Heaven and 20-year-old Leny Yoro will be Michael Carrick's only fit central defenders at Stamford Bridge.