The second part of the McLaren report, which found evidence of state-sponsored doping in Russia, is to be published on Friday.
Doping sanctions against Russia are extended until further notice by the International Olympic Committee.
The world's leading athletes will compete in a winner-takes-all Diamond League final after a major revamp of the event.
Three members of athletics' governing body have provisional bans extended after allegations they took money to delay naming drug cheats.
Audio & Video
Sprinter Usain Bolt says athletes caught doping should be given life bans
Her Olympic triumph in 2012 is the defining image of Jessica Ennis-Hill, writes Tom Fordyce, but there was much more that made her remarkable.
At a crucial time for the anti-doping movement, the ramifications of the hacking of medical records are widespread, writes BBC sports editor Dan Roan.
Around the Web
European Cross Country Championships on the BBC
Details of BBC Sport's coverage of the 2016 European Cross Country Championships in Sardinia.
How to get into Athletics
How to get into athletics - one of the widest ranges of choice in sport, from jumps and throws to sprints or distance running.
What's on BBC Sport this week
This week's sport on the BBC includes England's fourth Test with India, heavyweight boxing and European Cup rugby.