The International Olympic Committee's decision to put the participation of Russian athletes in Rio into the hands of their respective sports' international federations has yielded some big decisions with the Games less than two weeks away.
Here, we collate the current status, where possible, of each Olympic sport in turn - with the exception of football and rugby sevens, in which no Russian athlete had been scheduled to take part.
NEXT: Having already barred seven swimmers who fail to meet new anti-doping criteria, governing body FINA is subjecting the eligibility of the remaining team members to "specific additional criteria". The diving, synchro and water polo teams are not affected.
World Archery says Russia's three qualified archers have been "tested extensively" and are free to compete in Rio.
OUT: 68 (approx)
The IAAF has banned all Russian track and field athletes from Rio, with the exception of those who can prove they have been rigorously tested outside Russia: currently, only long-jumper Darya Klishina meets the criteria.
Four Russian badminton players have qualified for Rio. The World Badminton Federation (BWF) is yet to clarify their position.
Governing body AIBA is "reviewing and analysing, on a case-by-case basis, the anti-doping records of the 11 Russian boxers currently qualified for Rio".
The International Canoe Federation (ICF) has banned five Russian sprint canoeists from Rio after they were implicated in the McLaren report. Investigations are ongoing and additional bans are possible.
No word from governing body the UCI but its president Brian Cookson says: "It would be difficult for us to ban an entire team."
The International Equestrian Federation has cleared the five members of the Russian team to compete at the Games.
The International Fencing Federation (FIE) is reviewing the eligibility of the 16 Russian fencers and is yet to issue a statement.
World number 338 Maria Verchenova is the only Russian golfer in Rio. There has been no response yet from the sport's Olympics-affiliated body, the International Golf Federation (IGF).
The International Gymnastics Federation (FIG) is working "as soon as possible" to "establish the "pool of Russian eligible athletes".
The International Handball Federation (IHF) has requested "urgent" information regarding the current location of the Russian women's team in order that its 14 players can be tested "as soon as possible".
International Judo Federation (IJF) president Marius Vizer has indicated that none of the 11 members of the Russian judo team will be barred from the Games.
One Russian athlete, Maksim Kustov, plus a reserve, Ilia Frolov, have been barred by the sport's governing body, the UIPM, after being implicated in the "false positive" scandal.
Governing body FISA has banned Ivan Balandin for a "false positive" and Anastasia Karabelshchikova and Ivan Podshivalov for having previously served doping bans. The doping records of the remaining 25 Russian rowers are being individually assessed.
Six members of the Russian sailing team have been provisionally cleared to compete by the World Sailing Board. One, Pavel Sozykin, has been barred due to his implication in the McLaren report.
The International Shooting Federation (ISSF) voted unanimously that all 18 Russian athletes should be allowed to compete, as none are referenced in the McLaren report.
The International Table Tennis Federation (ITTF) is investigating table tennis' involvement in the McLaren report and will make a decision on the selected Russian athletes this week.
There has been no response as yet from the World Taekwondo Federation (WTF).
The International Tennis Federation (ITF) says Russian players nominated for Rio have already been subject to a total of 205 drugs tests since 2014, and will be allowed to play.
There has been no response as yet from the International Triathlon Union (ITU).
Governing body the FIVB says: "Russian athletes have been tested at the same level as all other countries and the majority of the testing analysis of Russian athletes has been conducted outside of Russia."
Russia has already had two quota places removed for repeated doping violations. The International Weightlifting Federation will ratify the participation of the remaining team members on an individual basis.
United World Wrestling says the Russian testing labs implicated in doping violations are not part of its testing protocol. It has requested more information and evidence regarding wrestlers said to be involved in "disappearing positive tests".