and the game ended with Arsenal's defeat

As a Liverpool fan, I feel very happy with Arsenal's defeat.

I was very worried that they would win because if Liverpool lost in the next game then the title would be starting to not be a sure thing. But with Arsenal's defeat, I think that even if Liverpool lost in the next game, they would still be 8 points ahead and with a good chance of winning the Premier League.
One man's downfall is another man's joy. Hehehe.
Seriously Arsenal are still not ready to win the English premier league title yet, not for now. Arteta has the opportunity to sign a good striker in the January transfer window but he was just confident of his team getting victorious this season even without a striker and now we see that decision hitting bad on Arsenal as they have recurrently dropped points in the premier in games theu should have won, just like today's match with Westham. Today's match result further reduces Arsenal chance in the premier league title race against Liverpool.