The Australian Open is underway ... but why are some tennis players playing under a blue flag and/or white flag?

While Ukraine's envoy to the United Nations Sergey Kyslytsya posted on Twitter an image of the United States flag turned blue and yellow to symbolize solidarity between the two countries, Russian ...

The flag's blue field represents the unity and loyalty ... This tricolor design was first used by the Russian Empire in the late 17th century and was later adopted as the national flag after ...