( CNN ) -- Former world No . 1s Maria Sharapova and Caroline Wozniacki lit up the court at the Miami Masters on Thursday , but the lights went out on Agnieszka Radwanska and Marion Bartoli in the other women 's semifinal . On an eventful day at the U.S. hard-court event , four-time grand slam winner Sharapova and the in-form fifth seed Radwanska both scored impressive victories to set up a final showdown on Saturday . Second seed Sharapova let a 4-1 lead slip in the opening set of her afternoon match with Danish No . 4 Wozniacki , but battled back to secure a 4-6 6-2 6-4 win in two hours and 34 minutes . The Russian , a three-time runner up in Key Biscayne , said she almost paid the price for not keeping to her strengths . `` I 'm a very aggressive player , '' the 2012 Australian Open finalist told the WTA Tour 's website . `` I go for my shots . I do n't hesitate . `` In the first set I stopped doing that a little bit , and it gave her confidence to come back and win that first set , but I 'm pleased I got it back right away and managed to win today . '' Wozniacki , who lost top spot in the world rankings after Victoria Azarenka won January 's Melbourne grand slam , was philosophical in defeat . `` I tried to do my best , and it just was n't enough today , '' said the 21-year-old , who beat Serena Williams in the last 16 . `` I was very close . But this is tennis . One time you win , one time you lose . '' Radwanska extended her winning career record against French seventh seed Bartoli to seven matches with a 6-4 6-2 win in a clash interrupted several times by the lights going out . The Pole who was victorious in Dubai earlier this month , registered her 25th win this season , having ended world No . 1 Azarenka 's 26-match winning streak in the quarterfinals . `` You 're really focused on the match and really want to finish in two sets , then suddenly the lights go off , '' the 23-year-old said . `` It was one of the weirdest matches I 've ever played . I was just in the locker room staying focused , trying to stay warm and ready to go . '' Bartoli , the 2007 Wimbledon runner-up , was hampered by a hip injury during the match , but still managed to defiantly complete the match . `` I know how it is to be playing with injury and playing with pain , but it 's always weird when someone else is struggling with it , '' Radwanska said . `` Today she was still playing and moving very well , though . So I really had to do my 100 % in the end . '' In the men 's draw , world No . 1 Novak Djokovic survived a late rally from Spanish fifth seed David Ferrer to set up a Friday semifinal with Argentine No . 21 Juan Monaco . Having breezed through the opening set , five-time grand slam winner and defending Miami champion Djokovic was made to sweat in the second before sealing a 6-2 7-6 ( 7-1 ) success . `` He 's like a wall on the court , '' the 24-year-old told the tournament 's official website . `` Gets a lot of balls back . He always makes you play an extra shot . `` I needed to play well and aggressive and step into the court from the first point . That 's what I did . '' Monaco celebrated his 28th birthday with a comprehensive 6-1 6-3 defeat of U.S. No . 1 and eighth seed Mardy Fish . Three-time Miami runner-up Rafael Nadal will play British fourth seed Andy Murray in Friday 's opening semifinal .
Maria Sharapova beats Caroline Wozniacki to reach her fourth Miami Masters final . Agnieszka Radwanka defeats Marion Bartoli in match interrupted by light failures . World No . 1 Novak Djokovic reaches men 's semifinals after beating David Ferrer . Djokovic 's last four opponent will be Juan Monaco , who beat U.S. No . 1 Mardy Fish .