Mikel Arteta bemoaned Burnley's old-school tactics after the Turf Moor pitch was left untouched and not prepared before the goalless draw.
The Arsenal manager complained of 'difficult conditions' as the grass was allowed to grow and was not watered.
Arteta claimed he was expecting a heavy pitch and adjusted the training ground surfaces at their London Colney base last week.
'The grass was this long,' Arteta said while gesturing.