Football pundit, Richard Keys has noted that Kai Havertz is now undroppable at Arsenal. This is following the German’s impressive start to the season. The commentator and presenter suggested that the former Chelsea star has quashed any doubts over his move to Arsenal and has become a key player for Mikel Arteta. He said via TBR Football, “Kai Havertz scored for the seventh consecutive home game v Saints. “A year ago we were all scratching our heads wondering why Arsenal had paid £65m for him. “I’m sure I’d have had something to say, but fair play to Mikel Arteta. Havertz is now undroppable.” D…