A Night to remember?

Ahead of Night of Champions, we look at where some of the key matches will be won and lost.

Who will take the titles on Sunday night?

Every WWE championship will be put on the line when Night of Champions hits Sky Box Office on Sunday evening. The WWE's latest big PPV sees the biggest stars in sports entertainment converge on the Wachovia Center in Philadelphia - and you can see all of the action live - and in high definition - on Sky Box Office from 1am (Monday morning). Ahead of the big event, skysports.com takes a look at the key clashes to consider where they will be won and lost. Who will emerge victorious with the WWE Championship? Which Diva will reign supreme? Will Jeff Hardy finally get his hands on gold? Who will Chris Jericho choose as his partner? These questions and more will be answered this Sunday, at Night of Champions.

WWE Champion Randy Orton vs. Triple H vs. John Cena

The Night of Champions features an intriguing "Power of Three" as a trio of prominent Superstars - WWE Champion Randy Orton, Triple H and John Cena - vie for the most coveted title in the world of entertainment wrestling. The long-lasting and deeply personal feud between Orton and Triple H cannot be overestimated. When the The Viper dealt a sickening head-blow to The Game, it left him stricken for months. The bad blood between the two leaves Cena as the dark horse, who has demonstrated his ability to dispose of Orton in the past, but lacks experience against The King of Kings having only contested him three times. The Triple Threat Match during WrestleMania XXIV could offer an insight into Sunday's encounter. Cena and Triple H exchanged blows before The Game executed his trademark Pedigree on the Doctor of Thuganomics, seemingly securing victory. The Viper was not to be outdone however, administering a devastating blow to Triple H's temple before pinning Cena for the win. Cena and The Game will undoubtedly seek to settle the score, and do everything in their powers to ensure Sunday's spectacle is not a repeat performance.

World Heavyweight Champion CM Punk vs. Jeff Hardy

Jeff Hardy is looking to turn the tide on what has been a disastrous year so far. A series of crushing defeats began in January's Royal Rumble where betrayal by his brother - Matt - stripped him of his WWE Championship. Ensuing defeats at Judgment Day and The Bash ensured the misery continued. Add to that CM Punk's decision to cash in his Money in the Bank contract on Hardy for the World Heavyweight Championship, and he is a man on a mission. Punk has shown the lengths to which he will go to retain the gold. Kicking a referee in the back at The Bash is a prime example. As for the likely victor? Hardy may be due some good fortune, but Punk will certainly give him a run for his money.

Divas Champion Maryse vs. Mickie James

Now, it is onto the ladies. Current champion Maryse's attempt to avoid opponent Mickie James has finally fallen flat as the two will square off on Sunday evening. Mickie displayed ruthless determination just to feature in the title-decider. She persevered through a Fatal Four Match Way against Kelly Kelly, Beth Phoenix and Rosa Mendes in impressive fashion. Maryse will be no pushover as reigning champion, and is sure to bring her win-at-all-costs mentality to the forefront. Her cunning blend of resourcefulness and willpower certainly presents a stern challenge to Mickie, but she will need to perform at her peak if she is to succeed.

Unified Tag Team Champion Chris Jericho & A Mystery Partner vs. Cody Rhodes and Ted DiBiase

Ted DiBiase and Cody Rhodes were scheduled to face Chris Jericho and Edge, but with Jericho's partner struggling with an Achilles injury their reign as champions appeared doomed. With Edge seemingly ruled out, his partner revealed a contingency plan allowing him to select a replacement tag team member of his choice. Keeping his cards close to his chest, Jericho insists he will disclose his partner's identity at the last minute and not a moment sooner. DiBiase and Rhodes have unfinished business with their rivals. Having earned a title match-up against Carlito and Primo for The Bash, Smackdown General Manager Teddy Long buckled under pressure, adding Jericho and Edge to the contest. The two younger Legacy members were then left seething as the Rated-R Superstar capitalised, claiming the title along with Jericho.

Intercontinental Champion Rey Mysterio vs. Dolph Ziggler

This is very much the case of an established champion facing-off against a quickly emerging talent. The masked Superstar has soared to the top of his game and is eager to defend his title. His opponent, the aspiring Ziggler arrived on the Smackdown scene following the 2009 draft. After notable victories over The Great Khali, R-Truth and John Morrison, it is no surprise he has been paired with a champion of Mysterio's pedigree. The tale of two Superstars at different stages in their careers should present an intriguing contest. Familiar with the role of underdog, Ziggler has frequently overcome the odds to triumph. With increasing momentum and confidence aplenty, he is a serious threat to Mysterio's reign.

ECW Champion Tommy Dreamer vs. Christian

It is fitting that Philadelphia is the host city for this title fight - the city most inexorably linked with the ECW. In Christian, Tommy Dreamer faces a friend and former champion. Christian earned the right to compete against the ECW Original by defeating Vladimir Kozlov, a result Dreamer had admittedly hoped for. Having lost Mark Henry, Jack Swagger and Finlay to other WWE brands, Christian is the only man standing in the way of Dreamer retaining his title. The battle between two respected individuals and close companions should not disappoint. Either way, the City of Brotherly Love will end the night by crowning a multiple-time champion.

United States Champion Kofi Kingston vs. Big Show vs. MVP vs. Carlito vs. Jack Swagger vs. The Miz

Reigning champion Kofi Kingston will go up against five others competitors in a Six Pack Challenge. The rare format ensures that the odds are stacked against Kofi, but he is not one to go down without a fight. Having tasted previous successes, his opponents will surely be hungrier than ever to return to the pinnacle of their sport and knock the title holder off of his mantle. With six in the ring the task becomes even more challenging as a variety of styles will be on display. Will size, speed or power dominate? Or will it be a host of factors that contribute to the victor being crowned champion? The lottery-like nature of the contest guarantees that it will be one to keep an eye on.