John Cena WWE
John Cena will fight Rusev for the United States Championship at WrestleMania 31. Getty

WrestleMania 31 is set to take place on Sunday at Levi’s Stadium in Santa Clara, California. It’s the biggest WWE pay-per-view of 2015, with nine matches on the card, four of which will have titles on the line.

WWE World Heavyweight Champion Brock Lesnar and Roman Reigns will square off in what will likely be the final match of the night. Lesnar has held the title since he won it at SummerSlam, while Reigns has never won the championship. His only title run in WWE came as one half of the tag team champions when he shared the title with Seth Rollins in 2013.

Sting made his first-ever appearance in WWE at Survivor Series, but WrestleMania 31 will mark his first match as a regular member of the company. He’ll face Triple H, and the former face of WCW is considered to be the biggest favorite on the entire card. Triple H hasn’t wrestled since Payback in June when The Shield defeated Evolution.

John Cena and Daniel Bryan both held the WWE World Heavyweight Championship in 2014, but they’ll be fighting for mid-card titles on Sunday. After Cena lost to United States Champion Rusev at WWE Fast Lane, the two will have a rematch at WrestleMania 31. Bryan lost his chance to fight for the WWE World Heavyweight Championship at Fast Lane, and he’ll be one of seven wrestlers in the Intercontinental Championship Ladder Match.

The Undertaker is set to make his first appearance in a year. His WrestleMania 31 match with Bray Wyatt will mark his first PPV match since having The Streak broken by Lesnar at WrestleMania 30.

The top seven matches on the card won’t begin until 7 p.m. EDT or later, which is the official start time of WrestleMania 31. The fatal 4-way for the tag team championship and the Andre the Giant Memorial Battle Royal are scheduled for the kickoff show, which begins at 5 p.m. EDT.

WrestleMania 31 can be seen on WWE Network, which can be added for a monthly subscription of $9.99 per month. Fans can also order the event on PPV, which will cost them $69.99 to see the event in HD. Viewers can watch the pre-show matches for free with the link below.