Both Williams and Sharapova swept into Saturday's finals with straight-set wins. Williams was particularly sharp in a 6-0, 6-3 rout of world No. 4 and defending champion Agnieszka Radwanska. Williams had 40 winners and 21 unforced errors, leaving Radwanska impressed.
"When Serena's playing like that, it really doesn't matter who's on the other side of the net," Radwanska said after Thursday's match.
Sharapova is ranked No. 2 in the world -- Williams is No. 1 -- and is 18-2 this year. One of the losses was in the semifinals in Doha to Williams. That gave Williams an 11-2 career record versus Sharapova, a mark that includes 10 straight wins. Sharapova hasn't beaten Williams since the WTA Tour Championships in 2004.
Sharapova is on a roll of her own, however, winning the recent tournament in Indian Wells, Calif., and taking her last 11 matches in straight sets. She beat Jelena Jankovic 6-2, 6-1 in 63 minutes in the Miami semifinals.
It is the third consecutive year and fifth time overall she's gained the finals in Miami but she has yet to win the event.
Williams had won in Miami five times between 2002 and 2008.