I don't think this is Arsenal and Tottenham having to fight for one remaining ticket to the Champions League. with a very small difference between the two points. Two consecutive defeats to be the cause. Arsenal lost to Tottenham 0-3, then continued to lose to Newcastle United 0-2. ah what happened to arsenal 
. Arsenal must win the next match and hope Tottenham will lose in order to qualify for the Champions League.
Premier League this season, many of my predictions were wrong. and I made a lot of prediction mistakes especially for arsenal.
I never trusted Arsenal. They started the league in bad shape and many didn’t expect to see them in top 4 but things turned around for them and they came to the top 4. But deep in me I know Arsenal cannot do well in Champions league. . Arsenal must win the next match and hope Tottenham will lose in order to qualify for the Champions League. Premier League this season, many of my predictions were wrong. and I made a lot of prediction mistakes especially for arsenal.
Personally I would like Tottenham to complete the spot than Arsenal. I trust Conte and his men more than Arteta and his men. Arsenal can lose a match you expect them to win convincingly. Just the match against Newcastle is am example.
Maybe next week then will try better and they could be lucky.