Arsenal's 4-0 win over Chelsea in pre-season had Thomas Tuchel fuming, but few would've expected it to serve as a warning for what was to come.
Last term the Blues finished five points ahead of their London rivals whilst also reaching two cup finals. The Gunners blew their chance of a top four finish and Champions League football with a late season collapse before a summer of change for both clubs.
Chelsea's Russian ownership ended with Todd Boehly arriving as co-owner, huge sums were spent on the likes of Wesley Fofana and Raheem Sterling whilst at the Emirates they added Premier League winning experience to their squad in Gabriel Jesus and Oleksandr Zinchenko.
