On Sunday, a WWE Ambulance Match is set to take place involving Roman Reigns and Braun Strowman. The two rivals will meet up again, this time at the WWE "Great Balls of Fire" 2017 pay-per-view. After months of in and out-of-ring meetings, these two competitors are going to lay it all on the line. Which of the two WWE "Raw" superstars will this match ultimately finish in favor of? Also, what will be next for each of these WWE superstars after Sunday's match? Here's the latest preview on Reigns vs. Strowman in an Ambulance Match.

Match build-up

As mentioned, this won't be the first time these two superstars have crossed paths.

They've met at various WWE pay-per-views and on WWE "Raw." Many times an ambulance has been involved somehow. Fans will remember back a few months ago to when Roman Reigns was doing an interview on "Raw" and was attacked by Strowman backstage. It led to Strowman viciously beating up Reigns, who eventually was helped by medical personnel and loaded onto a stretcher. Strowman didn't let up, as he shoved the stretcher off a dock ramp area. Later, he returned again after Reigns was loaded into the back of an ambulance. In a feat of impressive strength, Strowman tipped over the ambulance with Reigns inside it!

Within the past several weeks, Strowman made his return to WWE "Raw" and laid out Reigns.

He followed that up by informing him they'd fight in an actual Ambulance Match. The way that the match is won is by one competitor beating up his opponent to the point he can toss him into the back of an ambulance, shut both doors, and send the vehicle off to the hospital. Strowman actually did that with Reigns a couple weeks ago on "Raw."

This past week saw Strowman win the main event match over Apollo Crews and then load him into the back of an ambulance.

However, when the vehicle didn't leave the arena, he found out it was being driven by Roman Reigns. From there, the two rivals battled on the stage, with Reigns hitting an epic Spear to take Strowman off the stage to the area down below.

Who will win the match?

The winner of the Ambulance Match at Sunday's WWE "Great Balls of Fire" PPV will likely become the new No.

1 contender for the WWE Universal Championship. For a long time, rumors indicated that Braun Strowman would win the match and go on to face Brock Lesnar at WWE's "SummerSlam" PPV for the title. However, more recently, it was reported that Roman Reigns is scheduled to pick up the win.

The WWE betting odds for the pay-per-view also point to Roman Reigns winning. Currently, he's listed at the Paddy Power Irish sports book as an 8 to 11 favorite to win while Braun Strowman is an underdog but slightly, with "even" odds in the match. That means it could go either way, but most fans are expecting WWE to continue their push of Reigns as the newest top star in the company.

WWE's "Great Balls of Fire" PPV arrives on Sunday, July 9th starting at 8 p.m. Eastern Time on WWE Network.