Japan's Rio Olympic coach Makoto Teguramori urged his team to give him a selection headache with one, final captivating home performance against South Africa on Wednesday.

Ahead of Friday's announcement of Japan's 18 for the Summer Games, Teguramori said Tuesday he expects to see a glimpse of what the under-23 Asian champions can do in Rio de Janeiro, where they have been drawn with Nigeria, Colombia and Sweden in the first round.

South Africa has also qualified for its first Olympics since Sydney 2000, and could face Japan in the quarterfinals provided it makes it out of a group that includes hosts Brazil, Denmark and Iraq.