In London last year, where Agnieska was honored to be Poland's Olympic flag bearer, they had mixed fortunes, exiting the Games in the second round before withdrawing from the third round at Wimbledon to help Aga, suffering from illness, in her singles bid.
With a WTA doubles title already to their name, at Istanbul in 2007, the next step is to join the select band of sisters to have won a grand slam doubles title -- with the Williams and Roosevelts joined only by Ukrainians Alona and Kateryna Bondarenko in the history books.
Even if they fail, one thing is for sure -- that the Radwanska sisters are inspiring the next generation of Polish tennis players.
"I can clearly see that tennis in Poland is getting better. A lot of kids are trying to play right now and trying to be professionals -- so it's nice to see that -- and people are talking more about tennis so it's becoming more popular," says Urszula.
"And when I see Aga having great results, I want to be the same or even better."