Reporting a play from champ select

Is there a way to find a player you were in champ select with so I can report him? I think he got auto filled support and instead of talking like a person he ban's our mid laner's champ and starts telling us how we are gonna lose. Locked draven from our adc and kept saying hes gonna make us lose lp. Someone dodged anyway but I feel like that's kinda reportable. I just don't think that there is a way to report players from champ select and unfortunately I don't remember his summoner name.