I think it was around 2008-2012:

a guy loses his girlfriend in a car crash several weeks later he is in a bar where he meets a women and sleeps with her thesame night next day she knocks him out and sends him to a arena where he has to fight till death and its kinda a online thing where people in the internet can see it and thats all I remember.plz tell me the name

ps: I think the main guy was blonde and the women had black hair not sure tho.