Polish tennis star Iga Swiatek cemented her claim to the world No. 1 ranking Saturday with a straight sets win over Naomi Osaka in the Miami Open.

In a brief speech after her victory, Swiatek, 20, thanked her team and fans and also sent a message to Ukraine,

who held the No. 1 spot, Swiatek was already guaranteed to ascend to the top spot in the women's rankings even before the Miami championship.

Saturday's win for Swiatek was historic -- in more ways than one.

She is the fourth woman ever to win the Sunshine Double -- both Indian Wells and Miami -- after Victoria Azarenka last did so in 2016,

the first player to win the first three Women's Tennis Association (WTA) 1000 tournaments in a season.

she will be the first Polish player -- man or woman -- to reach the top ranking in singles tennis.

Watching your journey is really incredible," Osaka told Swiatek after the match. "I hope you continue having fun.