If we talk about possession, Arsenal is actually a little superior in the match despite their status as an away team, Chelsea actually started the match well and we can see how Arsenal had to work hard in blocking every attack built by Chelsea while Arsenal only tried to attack with a counterattack in the first half, but after Haverzt goal which was disallowed by the referee, Arsenal actually began to dare to press and often had to make Chelsea players gathered in front of their goal, so I think the score of 1-1 was fair for both teams although we can actually say that if Arsenal were unlucky in the final minutes of the game, Arsenal attack in the match was too focused on the wing and I think if they had a capable central striker of course maybe we would have seen a different result in end match The two teams are still competing so far in 3-4 positions with the same 19 points.
Actually the game between these two teams was really a fascinating encounter yesterday no doubt, and it was a game that would have gone either side if they were both taking their chances, and to be honest here, it was truly a fair result because if you look at the match stats, it shows that it was a very close contested affair, though just as you rightfully said, if arsenal was having a central forwarder, they would have definitely won this game because Chelsea central backs and the goalkeeper are not that impressive too me, and I think that they are the real challenge of this Chelsea team, so I believe that if arsenal was having a reliable attacker upfront just as you rightfully said, it would have been more difficult for Chelsea to stop arsenal not scoring the second goal.Then as for the unlucky part? No, I don't actually think that they are unlucky because they both lost so many goal scoring opportunities.