KEY BISCAYNE, Fla. — mulberry bags Agnieszka Radwanska was an 18-year-old unknown from Poland the first time she defeated Maria Sharapova, during the 2007 United States Open. “She was very consistent, got that extra ball back, and I made that extra mistake,” Sharapova said. “When I had my chances at break point, I didn’t take them. When she had them, she did- mulberry sale .” Radwanska, the No. 5 seed, cruised into Saturday’s final without losing a set and playing only one match that lasted longer than 1 hour 20 minutes — her semifinal against Marion Bartoli. But to claim the biggest of her nine career wins, Radwanska, 23, had to work harder against Sharapova, a former world No. 1 and the No. 2 seed. “This is a good problem, right?” she said. “Maybe tomorrow I’ll go somewhere- mulberry bags for sale .”