Maria Sharapova suffered a shock second round exit at the Miami Open as she lost in straight sets to world number 97 Daria Gavrilova . Gavrilova had only moved into the world 's top 100 this week but she gave a confident performance to overcome her fellow Russian 7-6 ( 7/4 ) 6-3 . The wildcard led 5-3 in the first set but lost three games in a row before taking the tie break and then closed out against the second seed after opening up a 3-0 lead in the second . Maria Sharapova suffers shock second-round Miami Open exit to fellow Russian Daria Gavrilova . Gavrilova ( right ) beat the world No 2 7-6 ( 7/4 ) 6-3 to secure her place in the third round at the Miami Open . Fourth seed Caroline Wozniacki had a far easier time of things as she eased to a 6-0 6-1 win over Madison Brengle in less than an hour . That may have been a disappointment for the home crowd but veteran Venus Williams was able to lift their spirits with a 6-3 6-2 win over Urszula Radwanska . The Pole 's elder sister and seventh seed Agnieszka progressed with a 6-4 7-5 win over Anna Schmiedlova while Ekaterina Makarova beat Karin Knapp 6-1 6-3 and Andrea Petkovic of Germany eased into the third round thanks to a 6-2 6-2 victory against Christina McHale . Venus Williams beat Urszula Radwanska 6-3 6-2 on home soil to lift spirits at the Miami Open . France 's Alize Cornet defeated Elena Vesnina 6-4 6-1 while Irina-Camelia Begu , Carla Suarez Navarro , Kristina Mladenovic , Kaia Kanepi , Paula Badosa Gibert , Karolina Pliskova , Samantha Stosur , Kurumi Nara and Elina Svitolina also progressed . In the men 's tournament , Canada 's Vasek Pospisil saw off the challenge of Juan Martin Del Potro to book his place in the second round . Pospisil claimed a 6-4 7-6 ( 9/7 ) win over the Argentinian , who was making his return after suffering a wrist injury that had seen him ruled out since January . Pospisil will now face ninth seed Grigor Dimitrov in the next round . Juan Martin Del Potro has been plagued by an injury to his wrist that has kept him out of playing this year . Del Potro ( right ) was unable to have a happy return from injury as he lost 6-4 7-6 ( 9/7 ) to Vasek Pospisil . Elsewhere in the first round , Mikhail Kukushkin defeated Steve Johnson 6-4 3-6 6-2 while Martin Klizan came through 6-3 6-4 against Paolo Lorenzi to line up a meeting with top seed and defending champion Novak Djokovic . Italy 's Simone Bolelli beat Marcos Baghdatis 6-2 6-2 while Mikhail Youzhny came from a set down to win 4-6 6-2 6-3 against Andrey Golubev . Teymuraz Gabashvili will face fifth seed Milos Raonic next after fighting back for a 0-6 7-6 ( 7/4 ) 6-3 win over Pablo Andujar and Federico Delbonis ' 7-6 ( 7/4 ) 3-6 7-5 win over Jiri Vesely earned him a meeting with David Ferrer . Borna Coric , Alexander Zverev , Alejandro Falla , Jerzy Janowicz , Alexandr Dolgopolov , Jurgen Melzer , Andrey Rublev , Steve Darcis and Thomaz Bellucci also came through their first round matches .
Maria Sharapova loses in straight sets to fellow Russian Daria Gavrilova . Wildcard Gavrilova won 7-6 ( 7/4 ) 6-3 to cause a second-round surprise . Venus Williams beat Urszula Radwanska 6-3 6-2 on home soil . Juan Martin Del Potro loses to Vasek Pospisil 6-4 7-6 ( 9/7 ) on injury return . CLICK HERE for all the latest news from the this week Miami Open .