Arsenal 2-2 Chelsea: Five things we learned
Arsenal and Chelsea played out a 2-2 draw, thanks to Hector Bellerín's well-taken equaliser in stoppage time.
It was the two London rivals' first Premier League fixture of the new year and there was plenty of pre-match motivation for both sides to prevail on this occasion.
It certainly looked that way in a first-half filled with an equal display of enthusiasm as both sides took the game to one another, producing 13 goalscoring chances. Álvaro Morata missed two golden opportunities, while Thibaut Courtois was forced into an excellent save to deny Alexis Sánchez inside the area.
Despite this, it surprisingly remained goalless until the 63rd minute. Jack Wilshere's thunderous effort broke the deadlock, although the hosts' lead did not last long at all. Chelsea were awarded a spot-kick just four minutes later, with Eden Hazard making no mistake from 12 yards to level the scoring.
Marcos Alonso converted from close-range after a probing low delivery by Davide Zappacosta late on, and it seemed as though the Blues would snatch all three points. However, Bellerín's well-placed effort midway through stoppage-time ensured both sides had to settle for a point.
An entertaining spectacle for the neutral, here are five things we learned from the thrilling encounter itself: