The sight of Arsenal manager Mikel Arteta being reduced to a frantic rage was all the confirmation Newcastle United will need that they are now a Premier League force to be taken very seriously.
Arteta was on the edge all night in his technical area as it became clear Arsenal were not going to be getting things their own way against the Magpies, with the flowing, easy on the eye, style that has been their trademark this season short in supply on Tuesday night.
The Gunners manager lost control in the closing minutes when he ranted at fourth official Jarred Gillett after only five minutes were added, then went face to face with Newcastle counterpart Eddie Howe when a penalty claim for handball against Jacob Murphy was ignored.