Three things we learned from Arsenal's enthralling win vs lively Chelsea

LONDON — Arsenal and Chelsea put on a show in North London on Sunday, with the Premier League giants going toe-to-toe in a wonderful early-season spectacle. MORE — Arsenal v Chelsea recap | Player ratingsSo many intriguing tactical tweaks took place as Morgan Rogers gave Chelsea an early lead but Arsenal roared back with goals from Kai Havertz and Martin Odegaard to take the lead. The Gunners are now 10 games unbeaten against Chelsea in the Premier League, but this win was up in the