Chelsea boss Rafa Benitez says Newcastle United defender Fabricio Coloccini should've been sent off for breaking Demba Ba's nose.
Ba felt the full force of the Argentina international's boot in his face as the pair challenged for a 32nd-minute loose ball, which the striker headed inches wide with the score at 0-0.
Benitez, whose side has now not won in four games in all competitions, said: "It was a penalty and a red card for me, the incident.
"In the middle of the park, you just carry on and go back from a free-kick. In the penalty area, you go back, penalty and red card.
"It changed the game. We lost one player with a broken nose, we had one substitution and we had a great reaction in the second half, but it was not enough."