"I just really thought I needed to step it up from my last match and play a little better," she said. "I was really happy with the way I focused."
Jankovic, playing for the second time in less than 18 hours, was repeatedly a step late trying to reach Sharapova's shots.
"I wasn't moving," she said. "I felt heavy on the court. I felt really tired and exhausted."
Jankovic questioned scheduling that forced her to play in consecutive sessions while Williams and Radwanska had a day off before the semifinals.
"Kind of crazy," she said. "I had a couple of hours of sleep, and then I had to be back on the court."
Sharapova looked fresh even though she has played a lot of tennis lately. She's bidding to become the third woman to win Indian Wells and Key Biscayne in the same year.
Steffi Graf did it in 1994 and 1996, and Kim Clijsters won both in 2005.
"Winning a title on its own, whether it's here or Indian Wells, is a great achievement," Sharapova said. "To be able to come back from that and recover in just a few days and come back to the final here, it's great. Physically, many years ago I wouldn't be able to do that, so I'm very proud of the way I have recovered."
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