on August 1 at the Hammerstein Ballroom, defeating Justin Credible. Punk established himself in ECW by going undefeated, defeating opponents such as C. W. Anderson, Stevie Richards and Shannon Moore. Soon after, Punk began feuding with Mike Knox after Knox's on-screen girlfriend Kelly Kelly was seen to have romantic feelings for Punk. Punk defeated Knox in their first singles match on the November 7 episode of ECW as well as a rematch the following week, after which Kelly Kelly celebrated Punk's victory over Knox. At Survivor Series, Punk had his first pay-per-view match when he teamed with D-Generation X (Shawn Michaels and Triple H) (DX) and the Hardy Boyz (Jeff and Matt) in their Survivor Series match against Rated-RKO (Edge and Randy Orton), Knox, Johnny Nitro and Gregory Helms, a match in which all the participants on DX's side survived elimination. On December 3 at December to Dismember, Punk participated in the Extreme Elimination Chamber match for the ECW World Championship, but he was the first person eliminated by Rob Van Dam. On the January 9, 2007, episode of ECW, Punk had his first loss in ECW against Hardcore Holly, ending his six-month unbeaten streak in singles competition. He also participated on the Money in the Bank ladder match at WrestleMania 23, WWE's biggest PPV, but lost the match. On the April 10 episode of ECW, Punk was involved in the feud between the New Breed, a group of young wrestlers and ECW Originals, the group of veteran wrestlers from the original ECW. Punk joined the New Breed after several weeks in which both the New Breed and the ECW Originals had attempted to recruit him. However, two weeks later he betrayed the New Breed during a four-on-four tag team match between the New Breed and ECW Originals by kicking New Breed leader Elijah Burke in the back of the head and costing them the match, after which Punk proceeded to deliver his finisher, the "Go to Sleep". On May 20 at Judgment Day, Punk defeated Burke in his first singles match on a WWE pay-per-view event. Punk then went on to One Night Stand on June 3 and teamed up with Tommy Dreamer and The Sandman in a tables match to defeat the New Breed and end the storyline. When ECW World Champion Bobby Lashley was drafted to Raw and stripped of the championship, a tournament to declare a