Lonely and Ultimate Duelist question

[Njmongoose]

You can do these by beating the AI, right?
Cuz it feels like ive beaten them a million times already and I already have had the million damage ach for some time.

[The Stray]

Yes, but it'll take forever, but actually around a week if you plan ahead, just do the 100 Single Wins against the AI and then get the other 100 Wins in either AI or Online if you're also missing the Online ones.