( CNN ) -- Women 's tennis No . 1 Victoria Azarenka is looking forward to more success despite the end of her perfect start to 2012 . The Belorussian had won 26 successive matches going into Wednesday 's Miami Masters quarterfinal -- the best start to a season since Martina Hingis went 37-0 in 1997 . However , the Australian Open champion suffered a shock defeat by French seventh seed Marion Bartoli , who will face world No . 5 Agnieszka Radwanska in Thursday 's semis after the Pole ended the comeback of Venus Williams . `` What I 've done in the last couple of months , I have to be really proud of myself , '' the 22-year-old Azarenka told the tournament 's official website after her 6-3 6-3 loss . `` I could have maybe played better today , that 's for sure , but I gave it all I had . But Marion played really well today , and she deserves the win . What else can I say ? I have to look forward . '' Defending champion Azarenka had won eight of her previous 10 meetings with the 2007 Wimbledon runner-up , including January 's Sydney International where Bartoli lost despite leading in both sets . `` I was up 5-2 in the first set and 4-1 in the second set , and I lost both , '' the 27-year-old Bartoli said . `` So I knew I had to stay really mentally tough and not show her anything . `` Even when I lost those three games in a row , I did n't get down on myself -- I had this positive energy . I was able to turn the match around again and step inside the court and play some great points . '' Fifth seed Radwanska booked her place in the last four with a commanding 6-4 6-1 win over former world No . 1 Williams , who was playing in her first tournament for seven months . Seven-time grand slam winner Williams had not played on the WTA Tour since withdrawing from last year 's U.S. Open , having been diagnosed with Sjogren 's syndrome -- an incurable condition which causes pain in the joints and fatigue . `` I did n't have a good day , '' said the 31-year-old Williams , who has won the tournament three times andw as runner-up in 2010 . `` Unfortunately , I just could n't press the issue . I do n't feel like she did anything special . I just could n't . I could n't get myself to do it today . `` If I 'm not feeling my best , then it becomes mental and I have to fight , and you have to fight and fight and fight . Today I just I did n't conquer it mentally . I have to be there mentally more than the next player . '' The winner of the Radwanska-Bartoli evening match will take on either former world No . 1 Caroline Wozniacki or four-time grand slam winner Maria Sharapova , who meet in Thursday 's opening semifinal . Meanwhile , two-time Miami champion Kim Clijsters is facing four weeks out after injuring her right hip during her third-round defeat to fellow Belgian Yanina Wickmayer . `` The current prognosis is that Kim will have to recover for four weeks first , '' read a statement on the four-time grand slam winner 's website. `` As soon as she has returned to Belgium , she will have additional tests . '' The 28-year-old is aiming to return at the Madrid Masters in May ahead of the season 's second grand slam event , the French Open .
Victoria Azarenka suffers her first loss of 2012 to Marion Bartoli at the Miami Masters . World No . 1 Azarenka had started the year with a 26-match winning streak . Polish fifth seed Agnieszka Radwanska into the last four after beating Venus Williams . TL;DR