3 things you need to know about Saturday's Premier League action

There wasn't great deal of movement in the Premier League table following Saturday's fixtures, but moments of sheer brilliance and utter stupidity provided plenty excitement during Matchday 6. 

Manchester United survived a late scare while they were down a man against West Ham United, while Chelsea brought Aston Villa back down to earth thanks to Diego Costa's elite scoring prowess, and both derby matches lived up to the physical and competitive reputation that makes them some of the most anticipated matches in football.

Here are three things you need to know about Saturday's Premier League action:

Jagielka's glorious strike rescues point for Everton in Merseyside derby

Gianluca Nesci: Everton had done nothing of note for 90 minutes at (a typically raucous) Anfield.

The Toffees hadn't been run off the pitch, per se, but Liverpool were clearly the better side and the 1-0 lead they carried into injury time, courtesy of a free kick from captain Steven Gerrard, was well deserved. Had it not been for the slightest of touches from Tim Howard on a Mario Balotelli volley, it would have been 2-0. Alas, with a draw still within reach, there was always hope that one moment of brilliance could salvage a point.

Phil Jagielka provided that moment in most dramatic fashion. Down a goal in the Merseyside derby, with the seconds ticking away, the defender - a point which cannot be stressed enough - unleashed this out of nowhere.

The result will come as a bitter disappointment for Brendan Rodgers and company, who outshot their local rivals 24-to-11, but were too often unable to conjure up any chances of note.

Note: xG represents Expected Goals, which you can read about here. It essentially tells you how likely a player is to score with a given shot considering the position he shoots from and the type of shot (header, strong foot, weak foot, etc.).

Daniel Sturridge, your presence is needed. Badly.

10-man Manchester United escape with win versus West Ham

Carlo Campo: In a match that was literally determined by a matter of inches, Manchester United left Old Trafford with a 2-1 win over West Ham after Kevin Nolan had an 89th-minute equalizer  controversially ruled offside.

The ruling marked a cruel ending for West Ham, who dictated the tempo of play for the entire second half, particularly following a red card to Wayne Rooney, who was sent off for a foolish challenge on Stewart Downing in the 60th minute.

A simple tug of the jersey would have sufficed, Wayne.

While Rooney seems like someone who is regularly sent off due to his inability to keep calm in certain situations, it's actually his first red card in the Premier League in over five years.

It wasn't all bad for Rooney, however, as he opened the scoring in the fifth minute with a strike that allowed him to surpass Thierry Henry for third place on the Premier League's all-time scoring list. He now only trails Alan Shearer (260) and Andy Cole (187) with 176 goals to his name at the age of 28.

Injury-ridden Arsenal salvage draw against North London rivals Tottenham

Despite Arsene Wenger's disappointment with his side coming away from the North London derby with one point instead of three, Arsenal supporters are breathing a sigh of relief as their side required a late, scrappy goal to remain unbeaten through the first six matches of the Premier League season.

Tottenham opened the scoring in the second half courtesy of a brutal giveaway from Mathieu Flamini in his own half. Erik Lamela regained possession for Tottenham and played a nice through ball to Nacer Chadli for the cool finish past Wojciech Szczesny.

It was insult to injury as Arsenal found themselves down to one substitution before halftime when injuries to Mikel Arteta and Aaron Ramsey forced Wenger to bring Flamini and Santi Cazorla on before he intended. 

As they had done for a majority of the second half, Arsenal applied intense pressure in and around the Tottenham box following the goal and were clearly hoping a cross would lead to an equalizer.

It wasn't until the final 20 minutes where hope was restored and Alex Oxlade-Chamberlain sent the Emirates into a frenzy. 

As Cazorla sent a ball into the box, it took a favourable deflection off a defender and bounced towards Danny Welbeck. What happened next was either the best dummy or the worst shot of the day. Welbeck looked set to have a go on net but his attempt found nothing but air and went through his legs to an open Oxlade-Chamberlain for the powerful finish.

Scenes of joy, however, will quickly be met with the realization that one of the team's most influential players could be sidelined long-term as Ramsey has already been ruled out of the club's next match.