#2 Arsenal need to learn game management
Arsenal were dominant in the first half and was in control of the game. They were stretching Chelsea's defense and were moving the ball around quickly. Arteta made sure that his side maintained a high line and tried to maintain the possession.
However, they were a shadow of themselves in the second half as they were completely on the back foot. The Gunners were sitting very deep and playing on the counter-attack, thereby losing control of the match completely. This poor attitude meant that Chelsea continued to push the equalizer and finally found their first goal in the 83rd minute.
Chelsea kept the pressure on the Gunners after the equalizer. Finally, the ball fell to Tammy Abraham who ran with it before releasing Willian into space. The Brazillian pushed the ball to the edge of the box, before passing it back to Abraham who finished it with ease. Here, the Gunners failed to run sprint back to cover the space. They simply ran out of the energy.
Arteta's footballing philosophy is based on a high-pressing style. He wants his team to move quickly with high intensity. The Gunners managed to maintain the tempo in the first half, ut faded away quickly in the second half. Arsenal, in general, needs to be fitter as they adapt to the quick style of Arteta and it will take months to develop the fitness to play in this manner.