My script is having trouble choosing 2 random players?

This is the part in my dueling game where it chooses 2 random players to fight. The problem is, I'm getting the error "ServerScriptService.MainScript:28: attempt to get length of local 'v' (a userdata value)". Any help?

for _, v in pairs(game.Players:GetPlayers()) do
        if v then
            local dueler1 = v[math.random(1, #v)]
            repeat local dueler2 = v[math.random(1, #v)] until dueler2 ~= dueler1

            table.insert(_G.duelers, dueler1.Name)
            table.insert(_G.duelers, dueler2.Name)

            status.Value = "The 2 duelers are " .. dueler1.Name .. " and " .. dueler2.Name
            wait(3)

            status.Value = "Now teleporting players to the map"
            wait(3)

            local torso1 = dueler1.Character:WaitForChild("Torso")
            local torso2 = dueler2.Character:WaitForChild("Torso")

            torso1.CFrame = CFrame.new(spawn1.Positon + Vector3.new(0, 2, 0))
            torso2.CFrame = CFrame.new(spawn2.Positon + Vector3.new(0, 2, 0))

            local sword1 = sword:Clone()
            sword1.Parent = dueler1.Backpack

            local sword2 = sword:Clone()
            sword2.Parent = dueler2.Backpack

            dueler1.Character.Humanoid.WalkSpeed = 0
            dueler2.Character.Humanoid.WalkSpeed = 0
        end
    end