Arteta's fluid Arsenal show United that reinvention takes time 

The Gunners may be a work in progress — but as they showed against Chelsea at least there is progress, unlike the stasis at Old Trafford

Lots done, lots more to do: Arsenal manager Mikel Arteta watched his side bounce back at Stamford Bridge. Picture: Adam Davy/PA Wire.

If Manchester United were watching their next opponents Arsenal here in a crazy game at Stamford Bridge they will have noticed the attacking verve that Ralf Rangnick's side will face at the Emirates on Saturday. But they may also reflect on how long reinvention takes.

Mikel Arteta's team are two years and four months into a new era in which the Spaniard was charged not just with building a new team but with putting together a long-term plan to totally revamp a club that had been snoozing for too long.