We must know before this match takes place, not many make them as favorites, and even some are very confident saying Arsenal will win. But all that can be answered, especially after they can lead 2 goals in the first half. Entering the second half, Arsenal began to realize that this was not the Chelsea they had seen, and were lucky enough when they could equalize to make the match end with a draw.
The match ended as draw, but Chelsea played a fantastic ball today. I wasn't surprised with their performance, I was expecting a draw in the match, but most people had confidence in Arsenal to win the match due to their impressive performance this season and Chelsea's poor performance this season. But I saw improvement in Chelsea's performance, and I knew the match wouldn't really be an easy one for Arsenal. Chelsea could have won the match today, the first goal that was scored by Arsenal was caused by the Chelsea goalkeeper's error, and it motivated Arsenal, and they were able to score the second goal. If the mistake wasn't made by the goalkeeper, Chelsea would have won the match today, but a draw is also bad for them because most people weren't expecting a draw in the match.
Chelsea wasn't supposed to draw but win that match with the expected performance of their game today, possessing the game in both half's leaving arsenal with no shots on target for 75 minutes not until when Chelsea's keeper made the costly error to what I would refer to as put of overconfidence.
And it wasn't just the first goal from arsenal that gave them the momentum to start pressurizing Chelsea but rather it was the wrong substitution made by the Chelsea coach in the second half substituting Sterling, Palmer and Moudryke was the wrong decision. How do you remove a trio that have been able to distablize and constantly penetrating the arsenal defense just because you've conceded a 1 goal you opted to remove those players and bring in defender's, and that was how arsenal took advantage of the game. Anyways, I won't deny that the game was very entertaining and both team did give in their all for the game.