Interesting question posed on Scott Keith's blog as to whether any one-on-one matchup has been done more times on PPV than Undertaker vs. Kane, which has been done 9 times.
No counting tags, Chambers, triple threats, Rumbles, four-ways, etc. Just straight 1-on-1.
Best I've come up with so far is Triple H vs. Randy Orton which has happened 8 times.
Cena vs. Orton is currently at 7.
I'm about to go check Triple H vs. Rock. Any other suggestions?
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Thank you, Eddie Guerrero.
http://www.wwe.com/f/styles/photo_large/public/photo/image/2012/04/33_Moscow_04112012jg_02128.jpg