starting role after two years of limited play as the backup

RIO DE JANEIRO -- One destroyed racket -- and one poor set -- later, Serena Williams made it safely into the third round of the Rio Olympics as she bids for a second consecutive singles gold medal.The No. 1-seeded American struggled for quite a while Monday night, before emerging with a 7-6 (5), 6-2 victory over Frances Alize Cornet, despite making 36 unforced errors and getting broken four times.I just needed to relax. I was missing shots by, literally, centimeters, and Im not really used to missing those shots, Williams said. I really had to figure out a way to adjust.Williams started well enough, taking the first three games and compiling 17 of the matchs first 21 winners. But then she dropped 5 of 6 games to fall behind 5-4.During that troublesome stretch, Williams reacted to losing two games in a row by mangling the tool of her trade, slamming it against the back of her green-and-white sideline bench before depositing it on the ground. Hardly the first time shes done that sort of thing -- and likely not the last, either.In her previous tournament, Wimbledon, Williams broke a racket after losing the opening set of a second-rounder against American Christina McHale. Williams then flung the racket so far behind her that it landed in the lap of a TV cameraman filming the match.From that point on, Williams didnt drop a set the rest of the way at the All England Club, taking 12 in a row to earn her record-tying 22nd Grand Slam title.She didnt quite generate that sort of spark Monday, 24 hours after she and older sister Venus lost an Olympic doubles match for the first time. They had been 15-0 with three golds, but that run is now over.So, too, is Cornets three-match winning streak against the younger Williams.Thats because Williams cut down on her mistakes in the second set.How?Just tried to add a little bit more spin, she explained. If its going out, maybe Im hitting it a little bit too flat.After three No. 1 seeds exited Sunday -- Serbias Novak Djokovic in mens singles, the Williams sisters in womens doubles, and Frances Nicolas Mahut and Pierre-Hugues Herbert in mens doubles -- Williams avoided that sort of result in singles. But Djokovics Olympics are over, because after he and Nenad Zimonjic lost 6-4, 6-4 to Brazils Marcelo Melo and Bruno Soares, the 12-time major champion said he will not enter mixed doubles in Rio de Janeiro.Williams singles match was touch-and-go for more than an hour. Cornet held a pair of set points in the opener but failed to convert either. Then Williams served for that set at 6-5, only to get broken at love when she double-faulted for the fifth time. In the tiebreaker, Cornet went ahead 5-4 before Williams claimed the next three points and the set.She raced to a 3-0 edge in the second set, and that was pretty much that.No tennis player ever has won two Olympic singles golds -- let alone two in a row. But Williams is not just any player, of course. Which is why it was rather remarkable that Cornet, who is ranked only 48th and never made it past the fourth round of a major in 42 appearances, entered Monday with a 4-3 record against Williams.She knows how to play me, Williams said. Every time I play her, Im not in my best shape.Joining Williams in the third round: No. 2 Angelique Kerber of Germany, No. 3 Garbine Muguruza of Spain and No. 7 Madison Keys of the U.S.Elsewhere, the man who got stuck in an elevator for 40 minutes and then beat Djokovic in singles on Sunday, Argentinas Juan Martin del Potro, got to the third round with another win in singles but lost to Spains Rafael Nadal in doubles.Del Potro produced a 6-3, 1-6, 6-3 victory over Portugals Joao Sousa, before heading back out on court with partner Maximo Gonzalez and getting beaten by Marc Lopez and Nadal 6-3, 5-7, 6-2. Add it all up, and del Potro spent nearly 7 hours on court in a span of barely 25 hours.In a tournament that began without half of the ATPs top 10, del Potro looks like someone who might be able to add another medal to his 2012 bronze.Because of injuries, del Potro went 2 1/2 years without participating in a major until Wimbledon, so one big question is what his fitness level is.Im getting better. Im in good shape, he said, but I dont know if Im prepared to play six or more matches.---Follow Howard Fendrich on Twitter at http://twitter.com/HowardFendrich Fake Mets Jerseys . -- Nate Robinson has played for seven teams, so beating one of them is no longer a rare occurrence. Cheap Mets Jerseys ., and Rudi Swiegers of Kipling, Sask., took sixth spot on Saturday in pairs at the NHK Trophy ISU Grand Prix figure skating competition. https://www.cheapmetsjerseys.us/ . 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Serena Williams has crammed 22 Grand Slam singles titles -- thats Pete Sampras, John McEnroe and Andy Roddick combined -- into her legendary career. Starting 17 years ago at the 1999 US Open, where the 17-year-old won her first major title and became thee first African-American woman to win the US Open since Althea Gibson, heres a timeline of her historic career.dddddddddddd ' ' '