Issue link: http://itf.uberflip.com/i/246310
2. Substitution of Doubles Teams If substitutes are required, Alternates shall be selected. The sign-in for doubles Alternates shall follow the same principles as the sign-in for singles Lucky Losers. One member of a team may sign in for the team. 3. Sign-in Requirements for Substitutes a. Alternates must be present and sign-in with the ITF Supervisor at least a half hour before the scheduled start of play, which may occur over several days, in order to maintain their priority among other Alternates. If the eligible Alternate is not available to play, he shall be placed at the bottom of the Alternate priority list for that day. b. Alternates must be ready to play in proper tennis attire within a total time of five (5) minutes after the announcement of a vacancy. Matches must commence without delay after the selection of the Alternate. F. SYSTEMS OF MERIT FOR SINGLES 1. Method A Entered players with an approved singles computer ranking, including a protected ranking, shall be selected in accordance with their positions on the approved computer ranking list available on the Entry Deadline and dated twenty-one (21) days prior to the Monday of the tournament week. 2. Method B Entered players without an approved singles computer ranking but with a current top 500 National Ranking will be drawn at the ITF Office at the Entry Deadline. These players will be sorted into groups of the same nationalities and ranked within those groups. Ties between players within those groups will be randomly drawn. Each country represented will be allocated the same number of draw chips as the number of players from that country. Each time a chip is drawn the highest ranked player from the country represented by that chip shall be selected. Thereafter, all remaining entered players who are unranked and have no National Ranking, shall be randomly drawn for a position on the Qualifying/Alternate List. 3. Method C On-Site Alternates with an approved singles computer ranking, including a protected ranking, who have signed in for Qualifying shall be selected in accordance with the computer rankings, on Monday, seven (7) days before the tournament week. 14 ITF Men's Circuit