WWE 'SmackDown' spoilers: 'Payback' contract signing

Seth Rollins, Roman Reigns, Randy Orton and Dean Ambrose have all signed to compete in the four-way WWE World Heavyweight title match at Payback later this month.

At the end of this week's WWE SmackDown tapings, the four participants penned a contract before Rollins got the better of his opponents in a brawl to end the night.

Elsewhere on the show, which will air on Sky Sports on Thursday evening, the team of Dolph Ziggler and Neville scored a pin-fall victory over King Barrett and Sheamus after Ziggler connected with the Zig-Zag.

Luke Harper scored a routine win over Fandango, while The New Day prevailed over Tyson Kidd, Cesaro and Ryback after a distraction by Bray Wyatt.

The Lucha Dragons recorded a triumph over Los Matadores, while Naomi saw off Emma.