PORTLAND, Ore. -- Jack Sock needed a little time to get up to speed Friday in his first Davis Cup match.Once Sock got his serve straightened out, the U.S. raced to a 2-0 lead over Croatia in the best-of-five quarterfinal tie.Sock overcame a two-set deficit to beat Marin Cilic 4-6, 3-6, 6-3, 6-4, 6-4, and John Isner topped Borna Coric 6-4, 6-4, 6-3 in the second match on the Tualatin Hills hard court.The U.S. can wrap up the Davis Cup tie Saturday with a win in the doubles match between twins?Bob?and Mike Bryan and Ivan Dodig and Marin Draganja. Two reverse singles matches are scheduled for Sunday.Our mindset is were happy, U.S. captain Jim Courier said. For us, its about putting our hard hats on and let Bob and Mike do what they do. I like our chances.The U.S-Croatia winner will advance to the semifinals in September to face the Czech Republic-France winner. The United States is seeking its first semifinals appearance since 2012.The United States is 157-3 when leading 2-0 in Davis Cup competition. The last time the U.S. blew a 2-0 advantage was the 1994 semifinals against Sweden.The Bryan twins are 10-4 in Davis Cup doubles competition.The 23-year-old Sock set the tone Friday, though it took a while to get going. Cilic, No. 12 in the world, rushed to a two-set lead after breaking Sock three times in the second set. But Sock also had his moments during the first two sets, and he used that, along with a bit of inspiration from Courier, to fuel a comeback.I had a ton of chances in the second. I didnt get blown off the court. I just had to make a few smarter decisions on the first serve and returning, Sock said.Courier noted that Cilic might be struggling a bit mentally after the 27-year-old Croatian blew a two-set lead to Roger Federer in the Wimbledon quarterfinals less than two weeks ago.I was using that as a little bit of a carrot to keep Jack in there, Courier said.The win over Cilic capped a big Friday for Sock, who earlier in the day was named to the U.S. Olympic team.As a kid you grow up and its kind of on your bucket list. Im very excited to get down there and hopefully play some good tennis, Sock said.Isner dominated with his big serve in his three-set win over the 19-year-old Coric, getting 23 aces to Corics three. The 31-year-old Isner, No. 16 in the world and playing in his 20th career Davis Cup match, broke Coric once in each set.The U.S. last hosted a Davis Cup match in 2014, when it lost in the first round to Britain in San Diego. This is the fourth time Portland has hosted a Davis Cup tie.The United States is trying to break a nine-year Davis Cup title drought. The U.S. won in 2007 when it beat Russia 4-1 in Portland. Croatia claimed its only Davis Cup title in 2005.The U.S. has won a Davis Cup-high 32 titles, but only one since 1995.In other quarterfinal ties:???Britain 1, Serbia 1: Dusan Lajovic breezed past James Ward 6-1, 6-3, 6-2 to even up their tie at one match apiece in Belgrade, Serbia.?Lojovic won 10 straight points in breaking Ward at love and holding at love for a decisive 3-1 lead in the third set.Britain took a 1-0 lead when Kyle Edmund beat Janko Tipsarevic 6-3, 6-4, 6-0 in the opening singles.? France 1, Czech Republic 1:?Lucas Pouille made a victorious Cup debut for France by beating Jiri Vesely 7-6 (2), 6-4, 7-5 to level Fridays matches in Trinec, Czech Republic.Amid increased security following the deadly attack in the French city of Nice,?Lukas Rosol saved two match points to prevail over Jo-Wilfried Tsonga 6-4, 3-6, 4-6, 7-6 (8), 6-4 in the first match.A minute of silence was observed at Werk Arena before the opening singles to honor the 84 people killed by a truck in Nice.All my thoughts are with the victims and families of this tragedy, Tsonga tweeted.? Argentina 1, Italy 0: Federico Delbonis won the first point for Argentina against Italy before weather postponed the second match between?Fabio Fognini and Argentinas Juan Monaco?until Saturday.Rain overnight and through the morning delayed the start of the tie for 2? hours, then Delbonis took more than 3? hours to beat Andreas Seppi 7-6 (4), 3-6, 6-3, 7-6 (3) in Pesaro, Italy. Cheap Rays Jerseys Authentic . That left plenty of energy for pitching books and swatting away free agency questions. Anthony had 24 points and nine rebounds, and the Knicks avenged an embarrassing home loss with a rout of their own, beating the Boston Celtics 114-88 on Wednesday night for their third straight victory. Cheap MLB Jerseys Authentic . Brandon Morrow allowed five runs on six hits over three innings. He struck out two, walked one and hit a batter. Edwin Encarnacion had a two-out, bases loaded two-RBI double in the third inning. http://www.cheapraysjerseys.com/ . A statement from the worlds top-ranked player says all checks "were satisfactory and showed positive evolution" regarding the injury, which contributed to his loss to Stanislas Wawrinka in the final in Melbourne. Cheap MLB Jerseys . How great will be revealed in the next couple of days at the board of governors meeting in Pebble Beach, Calif. Cheap Evan Longoria Jersey . Andrew Luck lost his favourite target and the Indianapolis locker room lost one of its most revered leaders when Reggie Wayne was diagnosed Monday with a torn anterior cruciate ligament in his right knee that will cost him the rest of the season. Les Miles feelings toward the Honey Badger lean more toward sweet than bitter these days.Miles, speaking to reporters Wednesday in a news conference before his?LSU Tigers?kick off summer training camp, called Tyrann Mathieus dismissal from the team before the 2012 season one of the worst things Ive ever done, just to be very honest with you.Mathieu and the?Arizona Cardinals?recently reached agreement on a five-year, $62.5 million extension that includes $40 million guaranteed, sources told ESPN NFL Insider Adam Schefter on Tuesday.Im so for him, I cant tell you,?Miles said.Miles kicked Mathieu off the team in August 2012?after repeated violations of the schools substance-abuse policy for athletes.Asked about Mathieus new deal, Miles said he thinks its wonderful.God bless him, Miles said. Im so happy for him, I cant hardlyy tell you.dddddddddddd He was and is a wonderful man, loved his teammates. There was never a time where there was a complaint about his social life. Frankly, were thrilled about the success he was having. Hes so passionate about playing that game, playing football, that its allowed the best in Tyrann Mathieu.Mathieu, who had been a Heisman Trophy finalist in the 2011 season, was later arrested for marijuana possession and missed the entire 2012 college football season before he turned his life around and was picked in the third round of the 2013 NFL draft by the Cardinals.In my way of thinking, hes eclipsed whatever history somebody would hold against him, Miles said. Im a Tyrann Mathieu fan. ' ' '