Things went from bad to worse early on, as Olivier Giroud missed a marvelous chance in the fifth minute and Juan Mata smashed the ball over Wojciech Szczesny a few seconds later to give the Blues an early lead.
Ten minutes later, after some defensive confusion, Ramires was slipped through on goal. When Szczesny tried to make himself big, the Brazilian tripped over his leg and went down. A specious penalty was given, and "Super Frankie Lampard" made no mistake.
From that point, Arsenal had a sharply uphill battle to get anything from the game. Despite a Theo Walcott goal just before the hour mark and a more spirited second half showing, Chelsea's resolve was too much.
Here are six things we learned from the Blues' win.