Yulia Efimova is relieved that her Olympic "nightmare" has come to an end and accused outspoken rival Lilly King of starting a "war" in Rio.
The Russian swimmer was provisionally banned after testing positive for meldonium this year, but governing body FINA overturned the decision on advice from the World Anti-Doping Agency.
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After being cleared to compete in Brazil, Efimova claimed silver medals in the 100- and 200-meter breaststroke, but was jeered at the Olympic Aquatics Stadium.
King took aim at Efimova after beating her in the 100m final, stating: "I'm just happy for the USA to know I am competing clean and doing what is right.