FIBA said Senegal would not attend the qualifiers in Belgrade after reporting coronavirus cases last week while in Germany for a tune-up game.
Nigeria will now be among 16 other teams that will compete in the mixed relay events at the Games in Japan.
Britain’s Mo Farah will not defend his 10,000 metres Olympics title after failing to qualify for the Tokyo Games.
The 4×400 metres team picked their qualification after recording the best time of 3:26.84 at the just concluded Lagos Open Athletics Championships.
Thiem will wear a wrist splint for five weeks.
Brume is expected to compete for Nigeria at the Tokyo Olympics slated for July and is widely seen as a potential medal hopeful for the country at the upcoming sporting fiesta.
Meanwhile, polls show as many as 80 per cent of respondents in a poll in Japan oppose holding the Olympics during the pandemic.
Nationwide, Japan has seen about 656,000 confirmed cases, with 11,161 deaths.
“The government hoped to advance peace on the Korean Peninsula and reconciliation and cooperation between the two Koreas through the Tokyo Olympics.”
“The decision was made to ensure “a safe and secure Games for all participants and the Japanese public.”
