How would you teleport players like a dueling position?

First you will need to Vector3 positions of the place you want each player to teleport to, and set up some variables

pos1 = -- Vector3 Position Here
pos2 = -- Vector3 Position Here

play1 =  --Leave blank
play2 =  --Leave blank

After that, we need to get some random players!

function RandomPlayer()
    local player = {}
    for _,v in pairs(game.Players:GetChildren()) do
        table.insert(player, v)
    end

    local num = player[math.random(1,#player)]
    local num2 = player[math.random(1,#player)]

    if num == num2 then
        repeat local num2 = player[math.random(1,#player)] until num ~= num2
    end

    play1 = num
    play2 = num2
end

Most likely a bit much to just get 2 players, but oh well!

Now we need to teleport them!

function Move()
    play1.Character:MoveTo(pos1)
    play2.Character:MoveTo(pos2)
end

Now if we put that together:

pos1 = -- Vector3 Position Here
pos2 = -- Vector3 Position Here

play1 =  --Leave blank
play2 =  --Leave blank

function RandomPlayer()
    local player = {}
    for _,v in pairs(game.Players:GetChildren()) do
        table.insert(player, v)
    end

    local num = player[math.random(1,#player)]
    local num2 = player[math.random(1,#player)]

    if num == num2 then
        repeat local num2 = player[math.random(1,#player)] until num ~= num2
    end

    play1 = num
    play2 = num

    return true
end

function Move()
    play1.Character:MoveTo(pos1)
    play2.Character:MoveTo(pos2)
end

RandomPlayer()
repeat wait() until RandomPlayer()

Move()