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Strikeforce: Heavyweight Grand Prix Semifinals is expected to take place on September 10, 2011 at U.S. Bank Arena in Cincinnati, Ohio.
This event averaged 274,000 Showtime viewers.
Strikeforce HW GP Post Fight Analysis
Strikeforce HW GP Tapology
Strikeforce HW GP Pre-Fight Analysis
| Match | Winner | Loser | Method | Round | Time |
| 1 | Dominique Steele | Chris Mierzwiak | Decision (Unanimous) | 3 | 5:00 |
| 2 | Alexis Davis | Amanda Nunes | TKO (Punches) | 2 | 4:53 |
| 3 | Jordan Mein | Evangelista Santos | TKO (Elbows) | 3 | 3:18 |
| 4 | Rafael Cavalcante | Yoel Romero Palacio | KO (Punches) | 2 | 4:51 |
| 5 | Mike Kyle | Marcos Rogerio de Lima | Decision (Unanimous) | 3 | 5:00 |
| 6 | Pat Healy | Maximo Blanco | Submission (Rear-Naked Choke) | 2 | 4:27 |
| 7 | Muhammed Lawal | Roger Gracie | KO (Punches) | 1 | 4:33 |
| 8 | Luke Rockhold | Ronaldo Souza | Decision (Unanimous) | 5 | 5:00 |
| 9 | Daniel Cormier | Antonio Silva | KO (Punches) | 1 | 3:56 |
| 10 | Josh Barnett | Sergei Kharitonov | Submission (Arm-Triangle Choke) | 1 | 4:28 |
