Duels is basically 1v1 PVP, The idea is you’ll spawn in the PVP lobby and can choose who you want to PVP with. Alternatively, you can go into a random match automatically and be matched with a random person, the matchmaking would match you with someone around your skill level, and the more you win, the better opponents you will face.
There will also be maps designed for PVP, It could either choose the maps randomly or they’d be picked by the players themselves, the PVP lobby would hold 16 people, but when going into a duel, only 2. There’ll also be kits for duels just like in PVP.