John Cena Accepts Seth Rollins' WWE SummerSlam 2015 Challenge on Tough Enough

Not even the recovery from a severely broken nose will stop John Cena from competing against Seth Rollins at SummerSlam 2015.

John Clapp of WWE.com noted that United States champion Cena accepted the challenge from WWE World Heavyweight champion Rollins during WWE Tough Enough on Tuesday. The SummerSlam showdown takes place Sunday, Aug. 23, and both titles will be on the line in a winner-takes-all fashion.

It did not go particularly well for Cena the last time he faced Rollins, in a July 27 U.S. Open Challenge on Raw, considering he severely broke his nose when Rollins "drove his knee into Cena's face," per Clapp. Cena ultimately prevailed in the battle, but the injury forced him "to undergo emergency surgery days later and miss the subsequent weeks' Raws."

Rollins even mentioned the incident while delivering some trash talk, per WWE Universe:

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"I am the man who broke the face that runs the place, Mr. #YouCantSeeMe." - @WWERollins http://t.co/fUbxRZVLCf

— WWE Universe (@WWEUniverse) August 11, 2015"

As if that trash talk wasn't enough reason to be motivated, Cena would tie WWE Hall of Famer Ric Flair's record of 16 world titles with a victory at SummerSlam.

Clapp noted Cena will not be the only one with motivation during the showdown:

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Not just eager to even the score against Cena, Rollins has stated it is his goal to add hardware — the U.S. Title — to his collection. The Architect is also likely determined to prove he is not a lame-duck champion, as some of his critics suggest. Rollins has repeatedly benefited from outside interference during his title reign, allowing him to retain the championship against the likes of Brock Lesnar and Randy Orton. A win over WWE’s top thoroughbred in the venerable Cena would go a long way toward silencing the doubters.

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Between the injury recovery, the subsequent trash talk, the potential for Rollins to alter his image and legacy, the possibility for a record-setting performance from Cena and the mere fact that both the U.S. and World Heavyweight titles will be on the line, there are plenty of storylines for SummerSlam as two of the sport's biggest stars prepare for a showdown.