ATLANTA -- Top-seeded defending champion John Isner and Jack Sock each rallied Friday in the Atlanta Open to set up an all-America semifinal between the practice partners. Isner beat Marinko Matosevic 7-6 (8), 6-4 in hot conditions, taking advantage of the Australians mistakes to run his Atlanta record to 14-3. Sock later topped Slovakias Lukas Lacko, 7-6 (6), 6-2 after trailing 3-5 in the first set. In the other quarterfinals, Germanys Ben Becker beat Dutchman Thiemo de Bakker 6-4, 6-2, and Israels Dudi Sela topped fourth-seeded Vasek Pospisil of Vancouver 7-5, 1-6, 6-2. Matosevic and Isner both slowed their pace of play in the second set as temperatures were in the high-80s under a blazing sun. On several occasions, Isner bent over between points to gather himself. "I knew he was struggling out there a little bit, and he knew I was struggling a little bit," Isner said after ending the mid-afternoon match with his 17th ace. "A lot of times in situations like that ... even though I appear to be super tired and I am super tired, I can muster up enough energy to pop some big serves in. "The beginning of that second set it felt like someone put us both in an oven." In the first game, Matosevic broke Isners serve. The defending champion would go on to win a modest 70 per cent of his service games, well below the ATP-leading 93 per cent win rate that he carried into the quarterfinals. Matosevics errors made up for gaps in Isners serves. The Australian sent an overhand smash well long to enable Isner to break serve for a 4-3 lead in the first set, and Matosevic double faulted to hand Isner set point in the 10-8 tiebreaker. Back-to-back double faults gave Isner a 4-3 lead in the second set. "It was just as hot as the 43 Celsius day I played in Australia this year if not hotter," Matosevic said. "(Isner) amped it up, and started serving like 10 mph faster in the second ... it was really, really hot out there." The 21-year-old Sock advanced to his second career semifinal. He made his first two weeks ago by beating Isner in straight sets on grass at Newport. In May, Isner beat Sock in straight sets on clay in Nice, France. They wont need scouting reports. "We practice together almost every day now out at Saddlebrook in Tampa, and so Im going to have to go out and use what I know from practice," Sock said. "These (hard) courts suit him pretty well because its high bouncing and when a 7-foot guy is serving down on you its not going to be easy." Sock teamed with Pospisil three weeks ago to win the mens doubles title at Wimbledon, and the pair will played a doubles match Saturday against Becker and his fellow German Frank Moser before singles play begins later in the afternoon. Fake Nike Air Max 90 . Alina Fodorova of Ukraine took third place. 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Freemans agent, Erik Burkhardt, revealed the move in an exclamatory one-word tweet about his client Sunday night: "Vikings!!!" Burkhardt then confirmed to The Associated Press in a phone interview that the 25-year-old agreed to a deal worth $3 million for the rest of the season. Giving Freeman that much money for only 12 games signals a big step away from Christian Ponder in Minnesota. Freeman was released by the Buccaneers on Thursday, a week after he was benched in favour of rookie Mike Glennon. Ponder, the Vikings first-round draft pick in 2011, struggled in the first three games of the season, all losses. He threw five interceptions and lost two fumbles and didnt get much help from an offensive line that couldnt keep the pressure off of him, or open holes for star running back Adrian Peterson. Matt Cassel took over in the last game while Ponder rested his injured ribs, and he gave the struggling unit a jolt. Cassel brought some much-needed rhythm and timing to the offence while throwing for 248 yards and two touchdowns in a 34-27 win over Pittsburgh in London. But with Peterson still in his prime and an upgraded group of receivers with veteran Greg Jennings and rookie Cordarrelle Patterson, the Vikings need to settle this critical position that has been in flux since Brett Favre faded in 2010 and retired for good after that season. Cassel is 31, and hes coming off consecutive rough years with the Kansas City Chiefs. Leslie Frazier said Monday that Freeman will not play this Sunday because theres not enough time for him learn the offence before the team plays in Carolina this weekend. Frazier also said that Ponder remains the starter, though hes recovering from a broken rib that kept out against the Pittsburgh Steelers in week four. If Ponder isnt healthy enough to start Sunnday, Cassel will make his second consecutive start on Sunday for the Vikings.dddddddddddd The winless Bucs released Freeman after general manager Mark Dominik contacted every other team in the NFL in an unsuccessful attempt to trade Freeman, a 4,000-yard passer a year ago and the teams career leader with 1,144 completions and 80 touchdowns. Freeman is owed the remaining $6.25 million on the contract he signed as the third quarterback selected in the 2009 draft behind Matthew Stafford and Mark Sanchez. Coach Greg Schiano benched Freeman after he completed only 45.7 per cent of his passes and posted a league-low quarterback rating of 59.3 through three games. Freeman threw for 4,065 yards, 27 touchdowns and 17 interceptions in 2012, but his inconsistent play down the stretch contributed to the team losing five of six games and failing to make the playoffs for the fifth straight year. He led the Bucs to a 10-6 record -- though not a post-season berth -- while throwing for 25 TDs and only six interceptions in his first full year as a starter in 2010. Freemans release capped a tumultuous month in which he overslept before missing a team photo shoot, was not voted a captain for time since his rookie year, and reportedly missed at least one other team meeting. This week, the saga took a messy turn when Freeman released a statement through his agent, saying he had Attention Deficit Hyperactivity Disorder and entered the NFL substance-abuse program more than a year ago after mistakenly taking Ridilin instead of Adderall to treat the condition. The NFL Players Association is investigating the quarterbacks claim that someone in the Bucs organization leaked confidential information about him being in the program to the media. According to Freeman and Burkhardt, the quarterback has passed all 46 tests administered by the league. Freeman was declared inactive for last weeks game and watched Glennons debut from a suite at Raymond James Stadium. Schiano called that a "mutual decision." ' ' '