The Gunners are fifth on the table, just a point behind fourth-placed Chelsea with a game in hand, while Tottenham are third with 70 points after their last gasp winner against Brighton on Tuesday night.
Speaking before Tottenham's game with Brighton, the German said he expects the two north London clubs to finish in the top four.
"[It will be] Manchester City first, because Liverpool also have the Champions League, so maybe they will lose some power and energy from that," he told Sky Sports.
"I believe they have a realistic chance against Barcelona, it's 50-50, but City only have the FA Cup final and the Premier League.
"I think at the end it will then be us and Tottenham.
"I believe in our quality and we have everything in our own hands. I don't mind about the other teams though, if we are in the top four everything is OK for me!"
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