UFC 133: Evans vs. Ortiz (formerly Davis) took place on August 6, 2011 at the Wells Fargo Center in Philadelphia, Pennsylvania.
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UFC 133 drew an announced attendance of 11,583 fans and a live gate of $1.5 million. The Prelims special on Spike TV averaged 1.4 million viewers and scored a 1.0 household rating and a peak audience of 1.44 million viewers.
UFC 133 Post Fight Analysis
UFC 133 Tapology
UFC 133 Pre-Fight Analysis
| Match | Winner | Loser | Method | Round | Time |
| 1 | Rafael Natal | Paul Bradley | Decision (Unanimous) | 3 | 5:00 |
| 2 | Mike Thomas Brown | Nam Phan | Decision (Unanimous) | 3 | 5:00 |
| 3 | Johny Hendricks | Mike Pierce | Decision (Split) | 3 | 5:00 |
| 4 | Ivan Menjivar | Nick Pace | Decision (Unanimous) | 3 | 5:00 |
| 5 | Chad Mendes | Rani Yahya | Decision (Unanimous) | 3 | 5:00 |
| 6 | Alexander Gustafsson | Matt Hamill | TKO (Punches and Elbows) | 2 | 3:41 |
| 7 | Rory MacDonald | Mike Pyle | TKO (Punches) | 1 | 3:54 |
| 8 | Constantinos Philippou | Jorge Rivera | Decision (Split) | 3 | 5:00 |
| 9 | Brian Ebersole | Dennis Hallman | TKO (Elbows) | 1 | 4:28 |
| 10 | Vitor Belfort | Yoshihiro Akiyama | KO (Punches) | 1 | 1:52 |
| 11 | Rashad Evans | Tito Ortiz | TKO (Knee to the Body and Punches) | 2 | 4:48 |
