The Night of Champions Unified Tag Team Title match is in jeopardy -- Co-Champ Edge underwent surgery on his Achilles tendon Tuesday morning. He injured the back of his left ankle in a house-show match against Jeff Hardy Friday night in San Diego. He was attempting to leapfrog Hardy when he suffered the injury, according to WWE.com.

Edge and his partner, Chris Jericho, are scheduled to defend their titles at Night of Champions against Legacy's Ted Dibiase and Cody Rhodes. The Million Dollar Man (we need more of him, by the way -- Daddy Dibiase was just as great as ever Monday night!) announced the match for his son Monday night when he was guest hosting Raw. (Edge did compete Monday night in a tag team match against the Colons-- Edge and Jericho won.)

I'm sure the WWE is waiting until Smackdown's broadcast Friday night to release any more information. (Chris Jericho does have yet another match against Rey Mysterio on the show...) Surgery photos are posted on WWE.com, for those of you who are interested, but I'm also sure they will air them Friday night about three times during the show to fill time.

Night of Champions is Sunday, July 26 in Philadelphia.

UPDATE: I guess Achilles tendon surgery is like the surgery to get a mole removed-- Edge made an appearance at the end of SD! to attack Rey Mysterio. (I'm guessing they taped the show last week as a double-header-- they do that from time to time...)