Arsenal traveled north to Newcastle and walked off the pitch with a hard-fought 1-0 at St. James' Park.
It was always going to be a tough game, with both sides worn out by the hectic New Year's fixture pileup and Newcastle's impassioned home fans energizing their team, which had only lost once on their home ground all season.
The entire game was very evenly contested, but it only took Olivier Giroud poking a long free-kick past Tim Krul to break the deadlock and hand Arsenal three points. The Gunners hunkered down defensively to hold onto the lead that Giroud's first goal in over a month had given them.
Let's look at six things we learned from a game that took Arsenal back to the top of the Premier League table.