Ddos attack?

So i was playing ARAM like i do everyday. I joke with the enemy team by saying them "rekt" and similar stuff, to which they respond friendly. However, just as we broke the enemy nexus after a long match, the enemy Brand typed in all chat "yasuo(thats me) got your ip" and after the victory screen "have fun with ddos". Is there a way to know if i actually got ddos'd and if i did is there a way i can report him? Thanks in advance
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