WWE's "Extreme Rules 2018" pay-per-view arrives on Sunday evening (July 15) from Pittsburgh, Pennsylvania. It's not expected that too many titles will change hands, but there are several championship matches with very close odds. Meanwhile, two champions are strongly favored to walk out of the PPG Paints Arena with their titles. Will WWE champion AJ Styles and WWE "Raw" women's champion Alexa Bliss prove that the oddsmakers are correct?

Styles, Bliss lead all competitors on card

The current WWE champion, AJ Styles, has been enjoying a nice title reign. As of this report, Styles has held the title for 247 days and counting.

That's better than several other recent WEE champions, including Seth Rollins (220 days) and Brock Lesnar (224). With that said, Styles is putting the title on the line against Rusev at the pay-per-view. Most fans expect Styles to retain and so do the oddsmakers who have AJ at -415 versus Rusev at +295.

WWE "Raw" women's champion, Alexa Bliss [VIDEO], is also heavily favored. It makes sense too, as she won the title using her "Money in the Bank" briefcase title shot at the pay-per-view of the same name. Everyone is banking on Bliss vs Ronda Rousey at "SummerSlam" with the title on the line. With that in mind, Alexa Bliss has -365 odds to retain the title against former champion Nia Jax.

Close match odds, possible title changes

While Bliss and Styles are heavy favorites, most of the other matches are not.

Only Braun Strowman (-245) against Kevin Owens (+175) is anywhere near them. For example, Finn Baylor is a -140 favorite against Baron Corbin at +100. Also, "Raw" tag team champions Matt Hardy and Bray Wyatt are just -150 favorites against The B-Team at +110.

WWE Intercontinental champion, Dolph Ziggler, who got the title by beating Seth Rollins [VIDEO], is a -190 favorite to retain the Intercontinental title against Seth Rollins (+150) in their 30-minute Iron Man match. Also, Roman Reigns is a -155 favorite to defeat Bobby Lashley (+115) in their top contender match. However, things get interesting in terms of potential title changes after these matches.

All of the other matches feature the challengers as the favorites. Shinsuke Nakamura is a -160 favorite to defeat Jeff Hardy for the United States Championship. Team Hell No is favored at -145 to defeat The Bludgeon Brothers (+105) for the WWE "SmackDown" Tag Team titles. Also, Asuka is a favorite at -160 to defeat WWE "SmackDown" women's champion Carmella (+120).

That could mean as many as three title changes or more depending on how the odds play out. The three title changes suggested by the odds seem to make the most sense heading towards "SummerSlam 2018" as the other titles are likely to play into large-scale matches on the card.

WWE's "Extreme Rules 2018" begins at 8 PM ET on Sunday, July 15 with live coverage on the WWE Network.