KEY BISCAYNE, Fla. (AP) -- Maria Sharapova lost her serve in the final game of each set Saturday and again fell short in a bid for her first Sony Ericsson Open title, losing to Agnieszka Radwanska 7-5, 6-4.
Sharapova, a three-time Grand Slam champion, fell to 0-4 in Key Biscayne finals. She was also the runner-up in 2005, 2006 and last year.
Radwanska, ranked a career-best No. 4, earned her ninth career title and second this year. She's 0-4 in 2012 against top-ranked Victoria Azarenka and 26-0 against everyone else.
The match was 72 minutes old before Radwanska hit her first baseline winner. She was content to play steadily and extend rallies until the more aggressive Sharapova would make a mistake.
Sharapova finished with 45 unforced errors and never broke serve.