This is slightly off topic, but it's still betting so...
I'm betting an Arsenal supporting friend of mine on the two matches this season. The rules we have decided on so far:
I win if Newcastle wins either game or both end in draws.
In order for him to win the bet, he needs Arsenal to win one, draw one or win both and attain a certain GD.
He thinks 2.5 is fair. I'm even skeptical at 3.5, but would probably do it.
Thoughts?