Who will come out on top when Manchester United travel to Stamford Bridge? espnstar.com looks at the key match-ups that matter.

Didier Drogba vs Jonny Evans

Chelsea come into this game full of confidence and none more so than their principle strike-weapon Didier Drogba.

Defenders know exactly what they are up against when Drogba is playing - pure power and pace. The problem is being able to deal with it.

Drogba will look to physically impose himself on the young defender from the start - so look out for him trying to bully Evans in the air and using his body strength to turn the youngster if he gets too tight.

Playing high up the pitch he is a master at holding the ball up before bringing others into play - be it Nicholas Anelka or a breaking midfielder such as Ballack or Lampard.

A much improved finisher since he arrived at Stamford Bridge he rarely needs more than one chance to get on the score sheet - and obviously is a major threat at set-pieces with his height. If Drogba can un-nerve the Irishman early on then expect him to score and for Chelsea to come out on top.

According to Sir Alex Ferguson young defender Jonny Evans is the future of Manchester United.
Having forged a reputation in the United youth and reserve teams he now seems to have his manager's confidence and that in itself must give him huge belief.

Despite his young age he has a very calm and composed manner and goes about his game with the minimum of fuss, refusing to be overawed by his opponent regardless of who it is.

He also has a good footballing brain - allowing him to snuff out danger before it arrives with a well timed interception or a good piece of positioning.

He is strong, has a decent turn of pace and is comfortable on the ball - but is prone to the odd lapse in concentration.

His challenge will be to stand up to the physical challenge presented by Drogba, and to stay switched on for the full 90 minutes.  If he can do that and perform to his maximum then he could frustrate the big striker and help his side to a memorable result.

Frank Lampard vs Darren Fletcher

How do you determine the value of one man to a team ?

If it's measured in commitment, consistency, leadership and vital goals then Frank Lampard is THE MAN at Chelsea. He works his socks off each and every game, provides the link between defence and attack, and gets other players playing.

After breaking a recent goal-drought normal service has been resumed - so look out for Frank getting on the score sheet from a trademark late surge into the box or a strike from around the box.

His understanding with Drogba and Anelka spells danger for the United rearguard as he can unpick the tightest of defences with a slide-rule pass or a clever flick.

Lampard is an all-action player so expect him to be heavily involved at both ends of the pitch.
If United give him too much time and space he will dictate the play and put Chelsea on the front foot - a dangerous proposition.

Darren Fletcher may not be the most skillful player on the United roster - but he is without doubt one of the most influential.

As the fabled United midfield has either aged (Scholes and Giggs) or departed (Keane and Beckham) it has fallen to Fletcher to provide the 'spark' and 'energy' that the team desperately need.

His conditioning allows him to harry the opposition for 90 minutes - putting pressure on the ball-carrier, tracking runs and making United a hard team to break down.

Offensively he sets the high-tempo that United play at when at their best. Driving forward he brings both wingers into play and supports the front two of Rooney and Berbatov.

Fletcher will look to break up the slick passing game of Chelsea and play at a tempo that the likes of Deco and Malouda find uncomfortable. If he can do this United will be difficult to beat.

John Terry vs Wayne Rooney

England and Chelsea captain John Terry is the heartbeat of the Blues side - leading by example and instilling a never-say-die attitude.

Big, strong and vastly experienced Terry is a player who relishes the big occasion and loves a challenge - so expect him to be at his imperial best this weekend.

Organisation is one of his big strengths so look out for him screaming and yelling at his teammates, ensuring that Chelsea defend as a unit rather than as individuals.

He is also excellent in the air, quick to close players down and a threat at corners and set-plays.
Terry will try to draw the temperamental Rooney into a physical confrontation - as he knows that the United man has the edge in pace and skill.

If he can stick tight to Rooney, force him to play with his back to goal and get in the odd crunching tackle then expect to see his opponent get frustrated and the Chelsea man to come out on top.

Rooney will be looking to celebrate the recent birth of his baby boy with a victory at Stamford Bridge.
He is probably playing his best football ever for club and country right now, and his unique mixture of skill and aggression poses a grave danger to Chelsea.

In a footballing sense Rooney is cleverer than people give him credit for - he will drop deep to pull defenders out of position and give himself room to turn and run at people.

He also has the strength to hold the ball up and the vision to play his teammates in on goal.

His enthusiasm and passion for the game burn for all to see, and in that way he is a great inspiration for his teammates who look to emulate his commitment.

Rooney is also capable of a piece of magic that can turn the game in a split second - a mazy dribble, a cannonball shot or an audacious chip from near the half-way line.

Rooney will look to torment Terry by moving him around the park, taking him out of his comfort zone and using his superior pace and technique to expose him.

If United can get the ball to his feet in the danger areas, allowing him to run at Terry then it could be the men in red who are rejoicing at the end of the match.