WASHINGTON -- Trailing in a tiebreaker against top-seeded John Isner, Steve Johnson managed to put a 146 mph serve into play and then decided to try something even more audacious: lob his 6-foot-10 opponent.Much to Johnsons surprise, the looping backhand worked, winning the point. Hanging in there against the big-serving Isner, Johnson weathered a total of 12 set points and withstood 29 aces to win their all-American quarterfinal at the Citi Open 7-6 (7), 7-6 (15) on Friday.Youre never too tall to lob. I thought he was going to close in really hard. And I just hit a good lob. I mean, thats about it, the fifth-seeded Johnson said about the point that came with Isner ahead 5-3 in the opening tiebreaker. I dont know if Ill ever try to lob him again and itll work, but luckily it worked today.Isners take?I love Stevie to death, he said, but I dont think that backhand lob he it -- I dont think he could do that all the time.Isner is a three-time runner-up at the hard-court tournament, including a year ago, when he beat Johnson in the semifinals. This time, Isner was unable to convert five set points in the opening frame and another seven in the second. When he lost the first tiebreaker on Johnsons forehand winner, Isner mangled his racket by slamming it to the court.The second tiebreaker was even longer and more excruciating for Isner. On his second set point, at 6-4, he got a good look at a short return by Johnson but shanked a forehand long.I dont think hell ever do that again, Johnson said. I dont know what happened.Heres how Isner explained it: I pulled up and got tentative.Not quite the longest tiebreaker of the season -- Isner lost one 18-16 last month -- it ended when he double-faulted for the only time in the nearly 2-hour contest to set up a sixth match point -- so lucky, Johnson said later -- then pushed a forehand wide.Johnson, ranked a career-best 25th, won despite never earning a break point against Isner. But Johnson saved all six break chances Isner accumulated and wound up with 22 aces himself.I certainly, in my opinion, put more pressure on him that he put on me, Isner said.Earlier Friday, sixth-seeded Jack Sock lost another two-tiebreaker match, beaten by 13th-seeded Ivo Karlovic of Croatia 7-6 (4), 7-6 (6).Karlovic hit 26 aces, saved all four break points he faced and reached the semifinals in Washington for the first time since 2007. Hell play Johnson on Saturday.Sock had a chance to force a third set against Karlovic, holding a set point at 6-5 in the second tiebreaker. But Karlovic erased that with -- what else? -- a 133 mph ace, then delivered a 130 mph service winner to get to match point. He won when Socks forehand clipped the net tape and flew wide.I feel like I scrap pretty well and get a lot of returns back and I still cant break the guy, Sock said. No matter who he plays -- any round, any tournament -- it comes down to a point here and there.The 37-year-old Karlovic, a 6-foot-11 Croatian, is coming off a title on grass at Newport, Rhode Island, last week.He is the oldest man to win an ATP singles tournament since 1979.Asked what its like to enter events where he could potentially face a teenager -- Zverev, for example, is 19 -- Karlovic replied: Yeah, I mean, I could be their daddy.After a brief pause, he added: And, I mean, who knows? Maybe I am.Then he cracked a big smile, rocked back in his chair and said, No, no, Im joking.The other semifinal will be second-seeded Gael Monfils against seventh-seeded Alexander Zverev. Monfils advanced by beating American Sam Querrey 6-4, 3-6, 6-1, while Zverev defeated No. 4 Benoit Paire 6-1, 6-3.Ken Griffey Jr. JerseyDave Valle Jersey . "We have always prided ourselves on the way we play defence. Having two big pieces back is going to be a key for us moving forward for years to come," said Knighthawks head coach Mike Hasen. https://www.cheapmariners.com/305k-omar-vizquel-jersey-mariners.html . The Australian is competing in his final season in Formula One and still looking for his first win this year. He will look to end Vettels run of six straight race wins on Sunday. Webber, who is fifth in the championship, earned his second pole from the past three races and 13th of his career. Jake Fraley Mariners Jersey . Scott Kazmir allowed four hits in seven shutout innings, Michael Brantley hit a two-run homer in a three-run first inning and the Indians maintained their hold on an AL wild-card spot with a 4-1 win over the Houston Astros on Saturday night. Cheap Mariners Jerseys .Y. -- Buffalo Bills coach Doug Marrone has drawn on his Syracuse connections once again by hiring Rob Moore to take over as receivers coach.Rickie Fowler bolstered his chances of a first PGA Tour victory of 2016 by moving in to a one-shot lead after the third round of the Wells Fargo Championship.Latest leaderboard Wells Fargo Championship The world No 5, who won the tournament in 2012, fired a joint-low round-of-the-day 68 to move above overnight leader Andrew Loupe and long-time pacesetter Robert Castro at the top of the leaderboard.Resuming three strokes back, Fowler mixed six birdies with two bogeys during an impressive display in tough scoring conditions at Quail Hollow. Fowler played alongside Scott Langley for the third round at Quail Hollow After starting with seven consecutive pars, Fowler followed a five-foot gain at the eighth with a 15-footer at the next to reach the turn in 34.Fowler made it a hat-trick of birdies at the 10th to move within one of Castro, only to drop shots when he two-putted the next from nine feet and failed to get up-and-down from the sand at the short 13th.The world No 5 bounced back by reeling in three birdies in as many holes to join Castro in a tie for the lead, before closing with back-to-back pars to set the clubhouse target at nine under. Rickie Fowler posted a joint-low round-of-the-day 68 to set the clubhouse lead at the Wells Fargo Championship I got off to a little bit of a slow start and had a couple of unfortunate bogeys, but other than that a good day, Fowler told Sky Sports.dddddddddddd I stayed patient, hit a lot of good shots and made some good putts, so definitely excited going in to tomorrow [Sunday].Castro took advantage of Loupes early back-to-back bogeys to move in to the share of the lead, before taking the outright lead when Loupe posted a third blemish of the day at the par-four ninth.The pair, playing in the final group, both posted bogey-fives at the 11th to reduce their cushion over the chasing pack, before Castro bounced back with an eight-foot gain at the 13th. A final-hole bogey cost Castro a share of the advantage The world No 282 gave away the lead to Fowler when he missed the 16th green, only to leave a kick-in gain at the next after a stunning approach tight to the pin. A bogey at the last from Castro saw him close a one-under 71 and slip back to eight under, as Loupe ended with a three-putt double from 40 feet to sign for a third-round 74. McIlroy carded five birdies, four bogeys and one double-bogey in his one-over 73 A blemish-free back nine helped Justin Rose to a three-under 69 to join James Hahn two strokes off the pace, with Scott Langley, playing alongside Fowler, a further shot back alongside Loupe after three birdies in a four-hole stretch late in his round.Phil Mickelsons hopes faded after finding the water at the 16th and running up a quadruple-bogey at the last, leaving him alongside defending champion Rory McIlroy eight strokes adrift.Watch the final round of the Wells Fargo Championship live on Sunday from 6.30pm on Sky Sports 4 - your home of golfAlso See:Wells Fargo leaderboardMcIlroy rues costly errorsWATCH: McIlroys monster putt!Golf live on Sky Sports 4 ' ' '