Unforgiven 2001 was the fourth WWE Unforgiven pay-per-view event produced by World Wrestling Federation (WWF). It was presented by Clearasil and took place on September 23, 2001, at the Mellon Arena in Pittsburgh, Pennsylvania.
- WWF Sunday Night Heat - Billy Gunn (WWF) defeated Tommy Dreamer (ECW)
- The Dudley Boyz (Bubba Ray Dudley and D-Von Dudley) (c) (ECW) defeated Big Show and Spike Dudley (WWF), Lance Storm (ECW) and The Hurricane (WCW), and The Hardy Boyz (Matt Hardy and Jeff Hardy) (WWF) - Fatal Four-Way Elimination match for the WWE Tag Team Championship
- Perry Saturn (WWF) defeated Raven (with Terri Runnels) (ECW)
- Christian (WWF) defeated Edge (c) (WWF) for the WWE Intercontinental Championship
- The Brothers of Destruction (The Undertaker and Kane) (c) (WWF) defeated KroniK (Brian Adams and Bryan Clark) (with Steven Richards) (WCW) for the WCW Tag Team Championship
- Rob Van Dam (c) (ECW) defeated Chris Jericho (WWF) - Hardcore match for the WWE Hardcore Championship
- The Rock (c) (WWF) defeated Booker T and Shane McMahon (WCW) - Handicap match for the WCW Championship
- Rhyno (ECW) defeated Tajiri (c) (with Torrie Wilson) (WWF) for the WCW United States Championship
- Kurt Angle (WWF) defeated Stone Cold Steve Austin (c) (WCW) by submission for the WWE Championship