On 20 August 2006, the fourth day of the fourth test between England and Pakistan at The Oval, he was involved in controversy when he and fellow umpire Darrell Hair ruled that the Pakistani team had been involved in ball tampering.
Harper was included in the original line up for this panel, at the time chosen over fellow Australians Simon Taufel and Darrell Hair (both of whom subsequently joined the panel in 2003).
Taufel has been named the top umpire of the year five times, and in August 2006 the ICC's annual umpire review officially ranked second for accuracy (behind Darrell Hair), and top overall.
Hair | Hair (musical) | Darrell Green | Darrell Waltrip | Darrell Scott | Darrell Hair | Madalyn Murray O'Hair | Darrell Issa | Darrell Evans | The Boy with Green Hair | Hair Police | Hair iron | Hair coloring | Darrell's Island, Bermuda | Yellow Hair | Sister Golden Hair | Hair straightening | Darrell Whitmore | Darrell Steinberg | Darrell's Island | Darrell Schweitzer | Darrell Guder | Darrell Goulding | The Hair and Skin Trading Company | The Bride With White Hair | Rachel Hair | My People Were Fair and Had Sky in Their Hair... But Now They're Content to Wear Stars on Their Brows | Killer Hair | Human hair color | Hair transplantation |