Arsenal might have hammered West Ham 6-0 a week ago but Kai Havertz has revealed that there was one element the wanted to improve on yesterday. The Gunners smashed another five past Burnley yesterday to continue their remarkable recent run of form and Havertz was once again among the goals. The German forward has started to really tick in recent weeks. After being scrutinised for much of the season following his £65m move from Chelsea, Havertz is now playing a key role. And speaking about the last two wins after the game yesterday, the 24-year-old revealed that Arsenal were not happy with not …