STANFORD, Calif. -- For nearly 9 minutes, Arizona made defensive stop after stop. In that critical sequence, the top-ranked Wildcats held Stanford scoreless and helped preserve their perfect start to the season. This confident, unbeaten group believes it should be doing that all game long. For Arizona, three straight defensive stops is called a "kill." Nick Johnson kept Arizonas unblemished record going for another game, hitting a go-ahead 3-pointer with 51 seconds remaining and two free throws with 5.8 seconds left as Arizona survived for a 60-57 victory Wednesday night for its school-record 21st straight win. "Were an outstanding defensive team. It isnt as if we changed any scheme, we just buckled down and had a lot of players playing very hard, and our ability to hold them to what we did is a big reason we won. Our defence won the game tonight," Arizona coach Sean Miller said. "No question we have to execute better on offence and we have to be more confident at the line." After Johnson hit a jumper in the middle of the key with 2:36 remaining to make it 55-53, Dwight Powell answered on a baseline drive with 1:21 to go before Johnson delivered once more. Johnson finished with 16 points, five rebounds and four assists and T.J. McConnell added 11 points, eight rebounds and four assists for Arizona (21-0, 8-0 Pac-12), off to the programs best start in conference play in more than a decade. Arizona is one of three unbeaten teams left in Division I, joining No. 2 Syracuse, which also won Wednesday night. Fourth-ranked Wichita State hasnt lost either. Powell and Josh Huestis each scored 13 points for Stanford (13-7, 4-4), which outshot Arizona 38 per cent to 36 per cent. "For 38 minutes, I thought we were right there," Stanford coach Johnny Dawkins said. "Credit Arizona for making the plays they had to make at the end. Nick Johnson stepping up, whether at the foul line or whether it was a 3-point bucket late. Ive watched a lot of tape of them, hes done it all year." Johnson missed a free throw with 28 seconds left and Stanford called timeout. Huestis missed a 3 from the left wing and Aaron Gordon secured the rebound, but he also missed a free throw giving the Cardinal one final shot. Chasson Randle missed a long 3 just before the final buzzer for Stanford. After a 3-pointer by Huestis with 10:03 remaining, Stanford didnt score again until Powells layin at 1:21 -- and Powell missed two free throws at 4:36 that would have put his team ahead. "Thats what we should have done the whole game. We came out a little lackadaisical and after that we turned it up when the sense of urgency turned up, and after that we kind of locked down," Gordon said. "It was good to come on the road and get a win, regardless of whether we won by 20 or we won by three like we did." Arizona, ranked No. 1 for a school-record eighth consecutive week, overcame a slow start on the way to an eighth straight win against Stanford. The Cardinal beat two Top 25 teams already with victories at then-No. 10 Connecticut and at then-No. 17 Oregon earlier this month. But not this time given their struggles in the waning moments at Maples Pavilion, which hosted a No. 1 mens team for the first time since losing 72-69 to Arizona on March 1, 2003. The Wildcats had a large contingent of fans in the crowd cheering "U of A! U of A!" Anthony Brown beat the halftime buzzer with a basket to put Stanford ahead 31-30. Arizona had trailed at halftime several times already this season only to produce a big second half. Arizona is on such a roll the players expect to win, even when they might not be at their best in a hostile environment. "One of the things we need to do is play defence at a high level more consistently and I think that will help us out a lot," forward Brandon Ashley said. "When we were down, we werent thinking about being down. For any team to be competitive, at any level, you have to be confident in yourself." Stanfords last home win against a No. 1 team came against Arizona, 82-74, on Feb. 4, 1988. Shaquem Griffin Jersey . "No difference at all," chirped U.S. roommate and linemate James van Riemsdyk. "Its still the same cranky Phil. D.J. Fluker Seahawks Jersey . She still remembers the massive roar of the home crowd when the Canadians walked out on the pitch before 47,784 fans at Commonwealth Stadium in 2002. Lang expects a similar reception for the Canadian team as the host nation at this years tournament, which begins Tuesday. http://www.seahawksfansofficial.com/will-dissly-jersey/. After missing 20 games as a rookie a year ago, Valanciunas - like the Raptors as a whole - has been fortunate to be in good health this season. As he spoke about it, the Raptors sophomore centre scanned the room for wood to knock on. "It is disappointing because we lost today so thats the worst part of the day," said Valanciunas, who left Tuesdays game with a lower-back sprain in the third quarter, missing the rest of Torontos 118-113 overtime defeat at the hands of the Hawks. Shaquem Griffin Seahawks Jersey . Vargas (8-3) allowed four singles and two walks while striking out five, allowing only two runners from a diluted Twins lineup to reach second base. Mike Moustakas and Jarrod Dyson hit RBI singles in the second inning against Kevin Correia (4-10), and that was all Vargas needed. Rasheem Green Jersey . This time, it was Eric Chavezs turn. Stuck in a rut since coming off the disabled list, Chavez hit the first pitch he saw in the ninth inning for a run-scoring single, sending the Diamondbacks to another walk-off victory, 4-3 over the San Francisco Giants on Saturday night.NEW YORK -- Dallas Stars forward Ryan Garbutt was fined $1,474 -- the maximum allowable under the collective bargaining agreement -- by the NHL on Saturday for spearing Anaheim Ducks forward Corey Perry in the groin Friday night. Garbutt was given a major penalty for spearing and a game misconduct midway through the first perriod in the Stars 6-2 loss at Anaheim.dddddddddddd "I was just coming back to the bench and got careless with my stick," Garbutt said. "It was deliberate," Ducks coach Bruce Boudreau countered. "It wasnt an accident. It was pretty dirty." The Ducks lead the first-round playoff series 3-2. 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