With their up and coming season, Liverpool can't afford a loss against Louis Van Gaal's team on Sunday. Here are some key elements for Brendan Rodgers to pay attention to.

With Manchester United looking for their sixth consecutive win, and with Liverpool struggling all season while playing away, the upcoming match between these two giants couldn't have come in a worse time for Brendan Rodgers' team. Their previous match at Old Trafford ended up with a 3-0 score for the Reds, but this time things might be completely different.

Manchester United's Dutch boss has worked his magic with his team, and overcame a troublesome start to make them third right now in the EPL. If Brendan Rodgers wants to prove their last visit against the Red Devils was not the result of one lucky day, then he should pay attention to some details so they can avoid a nightmare in the Theatre of Dreams.

1. Manchester United's shaky defending

Still under construction, and struggling all season with injuries to some key players, Manchester United's defense has not established yet as a dominant force in the league. Employing Antonio Valencia as a right back for the past few matches, Liverpool should pay attention to that flank, so the man from Ecuador can't work his way through their defense easily. Furthermore, his lack of defensive ability could be exploited by the Reds in order to create scoring opportunities.

2. Van Persie's goal scoring momentum

Regaining his striking capabilities, Robin Van Persie poses himself as a serious threat for Brendan Rodgers' squad. The Dutch international has scored six goals this season, but three of those came in United's recent games against Hull City and Southampton. Given Liverpool's lack of defensive order, Van Persie could balance this game single handedly for Van Gaal's men.

3. Marouane Fellaini's rise.

The Belgian midfielder was harshly criticized last season for his below average performances with the Red Devils, but under Louis Van Gaal's orders, the big-haired player has recovered his glory of old, establishing himself as a starter in United's midfield. Nevertheless, Fellaini's performances still have some flaws, such as giving up under pressure. Furthermore, his lack of speed represents a problem when United lose the ball and he has to pull back to defend his net. If Rodgers wants to win the battle in the midfield, neutralizing the Belgian could prove to be handy for them.