They could also potentially meet in the final.
And perhaps more so the top five.
Fresh faces could fill the medal spots this year with a host of top talent missing, including Marin, India's Saina Nehwal, China's Lin Dan and Malaysia's Lee Chong Wei.
Another pair of consistent finalists who in my opinion are just as strong as their higher-ranked colleagues and will cause real problems for the Chinese.
Olympic badminton venue at Tokyo 2020 The newly-constructed Musashino Forest Sport Plaza will play host to the world's best shuttlers.
To do that, it has to be smashed, and not all smashes are equal.