Two top-10 Russian tennis stars, including , have addressed their country's this week.

Speaking on Thursday, Medvedev, who last year, in his home country after winning a match in Mexico.

"In this moment, you understand that tennis sometimes is not that important," he said.

On Friday, Andrey Rublev advocated for peace, writing "No war please" on the camera after his win. Writing on the lens is a common practice after tennis matches.

The day before, on Thursday, the No. 7 player in the world explained his stance in

"In these moments you realize that my match is not important. It's not about my match, how it affects me. Because what's happening is much more terrible," Rublev said. "You realize how important it is to have peace in the world and to respect each other no matter what and to be united.... We should take care of our earth and of each other. This is the most important thing."

across other sports have spoken up in recent days, too.

Fyodor Smolov, a Russian soccer player who has been capped 45 times by the national team, posted a black screen to , with the caption "No to war," along with emojis of a broken heart and a Ukrainian flag.

All this comes after Russia's assault on Ukraine, which began on Thursday and has spread across the country. Russian forces have attacked by land, sea and air, and are currently battling for.