Ooof, Barnes on Matic could've done some real damage. I think Barnes has a case for it being accidental but it is reckless and could've ended Matic's season, the contact on his shin, just above the ankle really makes you wince. I don't see why it's described as being over the ball, he got the ball and his follow through catches the Chelsea player about as badly as it possibly could. Reminds me off the one Nasri(I think) put in on Walker at White Hart Lane a couple of seasons back, going for the ball but totally reckless.
Should've been a red for both. Matic reacted like an idiot and Ivanovic got booked for taking the red card off the referee, another ridiculous case of trying to intimidate and influence the referees.