Seth Rollins wants revenge for taking a guitar to the back.
On Raw after his match, Rollins was attacked by Elias who hit him with a guitar. Before the match, Elias' song was interrupted by Seth Rollins who was about to defend his Intercontinental Championship against Jinder Mahal. Elias apparently didn't appreciate it because he attacked Rollins with a guitar.
The following is the play-by-play of Rollins' match and the aftermath provided by David Tees.
Rollins catches Mahal with another super kick before Singh grabs his leg to distract him. Mahal rolls out of the ring to grab a chair and he hits Rollins with it as the ref was distracted for a near fall, Mahal looks for his finisher again and Rollins nails him in the midsection. Singh tries interfering again and Rollins power bombs him into Mahal, Rollins goes out of the ring to bring a steel chair back into it. Rollins attacks Mahal with the steel chair to cause a DQ.
Winner: Jinder Mahal w/Sunil Singh by DQ (Seth Rollins still the WWE Intercontinental Champion)
After the match, Seth Rollins continues attacking Jinder Mahal and Sunil Singh with chair shots until they escape backstage. Rollins goes to celebrate on the announce table and Elias appeaars from behind to knock him off the table to the arena floor with a guitar shot.
On Thursday, Rollins sent out a tweet threatening Elias with a curb stomp and a "mouth full of canvas." Elias responded by saying he is coming for the Championship. Rollins immediately offered a Championship match.
WWE made the announcement of the match on their website, on twitter, and in the video at the top of this page.
Elias and Rollins have never been in a singles match against each other on WWE television. They have been in a few matches with multiple opponents together like the Gauntlet Match back in February.