Is ignoring someone toxic?

My friend wants to play matches with me, so I did. After playing a match with my friend, he consistently started being toxic towards me for every match we play in.

The conversation after one match went like this:

Me: "why are you so toxic all of a sudden?" Friend: "because you were toxic to me" Me: "in what way was i toxic?" Friend: "you kept ignoring me" Me: "how is that being toxic?" Me: "explain how is that toxic." Friend: *silence

I don't want us to break our friendship (we are friends irl.) I also promised that I'll play matches with my friend tomorrow (5/27/17) I really want to know if ignoring someone is toxic or not. So that I can explain and clear things up for my friend.