KEY BISCAYNE, Fla. -- Lauren Davis defeated Zhang Shuai of China 6-2, 6-3 at the Sony Open on Wednesday as former U.S. Open champion Juan Martin del Potro withdrew with a left wrist injury. The 20-year-old Davis started 2014 ranked No. 72 and moved up to No. 55. From 1-1 in the first set, Davis jumped ahead to a 4-1 lead. In the second set, Zhang started with a 3-1 lead, but Davis won the next five games to take the match. "Im playing really well and I have a lot of confidence," Davis said. "I think theres a time for everything and I feel like this is my time." Fellow American Christina McHale defeated Zheng Jie of China 6-4, 6-2. Wildcard recipient Victoria Duval didnt fare as well as her fellow Americans, losing to Dutch qualifier Kiki Bertens 7-6 (5), 6-1. Del Potro has been troubled by his left wrist since winning the Sydney title at the beginning of the year. At the recent Indian Wells tournament he played one doubles match, but then withdrew from the singles. The 37th-ranked Andrea Petkovic of Germany, a top 10 player in 2011, posted a 6-3, 6-4 win over Maria-Teresa Torro-Flor of Spain. In first round mens action, 80th-ranked Adrian Mannarino of France ousted 71st-ranked Nikolay Davydenko of Russia 6-4, 7-5. Czech Radek Stepanek defeated Daniel Brands of Germany 6-3, 6-0. Ivo Karlovic of Croatia claimed up a tough 7-6 (3), 7-6 (5) win over French qualifier Paul-Henri Matthieu. Fake Jerseys For Sale .FIFA said its appeals panel ruled the case not admissible.The former U.S. Attorney had objected to ethics judge Joachim Eckerts summary of the World Cup bid investigation, claiming numerous materially incomplete and erroneous representations of his work. Fake Soccer Jerseys . 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Barcelona, still without the injured Lionel Messi, again turned to Neymar after his hat trick against Celtic in the Champions League on Wednesday to convert a penalty on the half-hour mark and restore the lead in the 68th after Villarreal levelled.MELBOURNE, Australia - Rafael Nadal kept telling anyone who would listen that his fitness levels wouldnt stand up to the rigours of a two-week Grand Slam tournament. Tomas Berdych proved him right.Nadal, who had played only eight matches since last June coming into the Australian Open because of a right wrist injury and appendix surgery in early November, was knocked out in the quarterfinals 6-2, 6-0, 7-6 (5) on Tuesday by Berdych — who had lost 17 straight matches to the Spaniard.It is obvious that I needed something more to be more competitive, Nadal, a 14-time major winner, said. As I said when I arrived here, the process always is not easy. When you have injuries, comebacks are difficult. But without being at my top level of tennis, I was able to be here in quarterfinals. Is not a bad result at all for me.Berdych, while thankful for the win, was reminded of a quote from the late Vitas Gerulaitis after beating Jimmy Connors for the first time in 16 matches: Nobody beats Vitas Gerulaitis 17 times in a row.So no one, not even Nadal, could beat Berdych 18 times in a row?Ive heard that one already, Berdych said, smiling.The other mens semifinalists will be determined on Wednesday when top-seeded Novak Djokovic plays Milos Raonic and defending champion Stan Wawrinka takes on U.S. Open runner-up Kei Nishikori.Berdych will play sixth-seeded Andy Murray in the semis after the British player beat local hope Nick Kyrgios 6-3, 7-6 (5), 6-3. Kyrgios came back from two sets down and saved a match point in the fourth round Sunday before beating Italian Andreas Seppi, the player who eliminated Roger Federer in the third round, but there was no such comeback on Tuesday.The 19-year-old Kyrgios, who walked onto the court with his headphones on and gave two thumbs-up to the crowd, was at his crowd-pleasing best. After hitting a backhand drop shot at the net for winner in the second set, he spread out his arms for applause, and in the third set, he hit a between-the-legs shot that Murray easily returned.It was a tricky match, Murray said. I tried to start as quick as posssible because I know how dangerous Nick is.dddddddddddd Hes a huge hitter of the ball, so I tried to keep it out of his strike zone as much as possible. Thankfully it worked.Kyrgios, who beat Nadal in the fourth round at Wimbledon last year, likes Murrays chances now that both Nadal and Federer are out of the Scotsmans half of the draw.I said to him at the net, This is your time, go for it. I think hes got a really good chance of winning the whole thing, Kyrgios said.On the womens side, Maria Sharapova moved closer to another Australian Open title, defeating 20-year-old Eugenie Bouchard 6-3, 6-2.The Russian made all the big points look easy and advanced to play Ekaterina Makarova, who earlier beat third-seeded Simona Halep 6-4, 6-0.I felt pretty good from the start, didnt feel I had too many letdowns, Sharapova said, adding that her close call in the second round — facing two match points against a qualifier — sharpened her focus for the rest of the tournament.The last time Sharapova and Bouchard met — in the semifinals at the French Open last year — Bouchard won the first set before Sharapova came back to take the next two. The Russian then won the title at Roland Garros.This time, Bouchard, who made the finals of Wimbledon and two other Grand Slam semis last year, didnt come close to taking a set, looking flat from the outset while being broken in her opening service game. The Genie Army, a group of young Australian men who croon about the Canadian player, was left to sing another day.She didnt give me many chances, and against the great players you have to take any chances you can get, Bouchard said.The other womens semifinalists will be determined on Wednesday when No. 1-ranked Serena Williams plays last years finalist, Dominika Cibulkova, and Venus Williams, playing in her first Grand Slam quarterfinal in nearly five years, takes on 19-year-old American Madison Keys.If the Williams sisters play each other in the semifinals, it would be their first meeting in a Grand Slam tournament since the Wimbledon final in 2009 — won by Serena. ' ' '