[2] Initial reactions from players were mixed, with Rafael Nadal in favor of the scheme and Roger Federer opposed.

[2][3] In early March 2007 at the Las Vegas Channel Open there was controversy when the ATP decided that James Blake had qualified for the quarterfinals only to revert that decision hours later.

[4] Player reactions became increasingly negative, claiming the format was confusing and could enable match-fixing.

[4][5] On 21 March 2007, the ATP announced that it had abandoned the experiment and had decided that the remaining scheduled round-robin tournaments would revert to the single-elimination form.

Winners/runners-up by country: Following is a list of notable players (winners of a main tour title, and/or part of the ATP rankings top 100 (singles) or top 50 (doubles) for at least one week) who announced their retirement from professional tennis, became inactive (after not playing for more than 52 weeks), or were permanently banned from playing, during the 2007 season: