Peter Bodo, the co-author of Pete's auto-biography, "A Champion's Mind" and a frequent writer for Tennis Magazine stated his view of the incident in the following two articles:
http://tennisworld.typepad.com/tennisworld/index.html
http://espn.go.com/sports/tennis/blog/_/name/bodo_peter/id/4997105/agassi-broke-unwritten-code
Steve Flink on tennischannel.com, reached the same conclusion as to who was at fault, but for a different reason:
http://www.tennischannel.com/news/NewsDetails.aspx?newsid=7189
http://tennisworld.typepad.com/tennisworld/index.html
http://espn.go.com/sports/tennis/blog/_/name/bodo_peter/id/4997105/agassi-broke-unwritten-code
Steve Flink on tennischannel.com, reached the same conclusion as to who was at fault, but for a different reason:
http://www.tennischannel.com/news/NewsDetails.aspx?newsid=7189