KANSAS CITY, Mo. -- Luis Mendoza finally figured out what he needs to do to succeed at home. Mendoza pitched four-hit ball in matching zeros with Lucas Harrell for seven innings Sunday before Alex Gordon and Eric Hosmer each had run-scoring singles off reliever Hector Ambriz in the eighth to lead the Kansas City Royals to a 2-0 win over the Houston Astros for their fifth straight win. Mendoza was winless with an 8.05 ERA in his first four home starts this season but was at ease on the mound Sunday. "Mendy threw a tremendous game," Hosmer said. "He really had his sinker working and was pounding strikes and playing great defence behind him. Moose (Mike Moustakas) made a lot of great plays behind him." The Royals bullpen has not allowed a run in 17 2-3 innings in the past six games. Royals manager Ned Yost had no doubt Kansas City had the upper hand if the outcome would be determined by the relievers. "Mendy was throwing great and still was at 90 pitches, but was fixing to come around for the fourth time to the top of that order," Yost said. "And Im sitting there thinking Ive got (Aaron) Crow, (Greg) Holland, (Kelvin) Herrera, (Tim) Collins, Hoch (Luke Hochevar) and (J.C.) Gutierrez, who threw two easy innings last night, plus Bruce Chen. Im fully stocked. It doesnt matter how long this game goes, Ive got enough pitching to wait it out." Crow (2-1) worked a scoreless eighth to earn a victory that gave the Royals their longest winning streak since taking seven in a row form Sept. 10-17, 2011. With one out in the eighth, Chris Getz singled and stole second off reliever Amrbiz (1-3). Gordon, who was 1 for 18 on this homestand, singled to centre for the first run. Gordon moved to third on centre fielder Trevor Crowes errant throw home and scored on Hosmers single. Greg Holland pitched a spotless ninth for his 12th save in 14 opportunities. Harrell, who has won only once since April 29, was held the Royals to two singles in seven scoreless innings. "He was outstanding," Astros manager Bo Porter said. "Even early on when he walked a couple of guys he made good pitches to get out of innings. He did a tremendous job going seven innings against a pretty good-hitting lineup." The Astros got only one runner past first base in the first six innings. Ronny Cedeno doubled to start the third and advanced to third base on a groundout, but was stranded there. Mendoza, who entered 0-2 with an 8.05 ERA in four home starts, retired 12 in a row after Cedenos double. Harrell, who had won only one of his previous seven starts, retired 13 in a row from the second inning until Perezs single in the sixth. But he was quickly erased when Billy Butler grounded into a double play. Perez also singled in the first, when the Royals loaded the bases with two outs on walks to Butler and Mike Moustakas walked in the first to load the bases with two outs. Harrell got out of the jam by retiring David Lough with a fielders choice grounder. Harrell allowed just one runner -- Jeff Francoeur, who walked to leadoff the second -- after the first inning. Harrell threw 51 pitches -- only 26 strikes -- in the first two innings, but needed just 48 pitches for the next five innings. "I was more aggressive," Harrell said after the first two innings. "I started pounding the zone and using my sinker more to get ahead. And then I threw some really good curveballs." The Astros opened the seventh with singles from Carlos Pena and J.D. Martinez, but failed to score. NOTES: Royals SS Alcides Escobar, who is mired in a .191 slump with a .221 slugging percentage in his past 32 games, was given Sunday off after playing in the first 59 games. ... 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MANCHESTER, England -- Pep Guardiola brought down the footballing superpower he helped to create, leading Manchester City to a 3-1 win over Barcelona in a landmark Champions League result for the English club on Tuesday.The victory that City and its Abu Dhabi ownership has craved since joining the Europe elite in 2011 was achieved the hard way, too, coming after Lionel Messi gave Barcelona a 21st-minute lead with his 90th goal in the Champions League.City took advantage of a defensive error to equalize through Ilkay Gundogan in the 39th minute and swarmed all over Barcelona in the second half, with a free kick from Kevin De Bruyne and Gundogans second goal completing the comeback.City has modeled itself on Barcelona -- in the boardroom, on the field and most recently in the dug-out by bringing in Guardiola, who coached Barcelona to 14 trophies from 2008-12 and turned the Messi-inspired team into perhaps the greatest club side ever.For that reason, it will be the sweetest of wins for City.Now we realize we won against the best team (in the world), Guardiola said. For the future generations, they are going to realize, `Wow, these guys are able to beat the best team.It was also crucial in the short term for City, reigniting its Group C campaign that would have been on the rocks with a loss at Etihad Stadium. City is now two points behind first-placed Barcelona after four games, with both teams big favorites to progress to the last 16.For 38 minutes, Barcelona looked like rolling to a sixth straight win over City in the last four seasons in the Champions League, the most recent being a 4-0 victory in Camp Nou two weeks ago. Barcelona coach Luis Enrique said it was one of the best passages of play his team has ever produced, with Citys defense carved open by the potent front three of Messi, Neymar and Luis Suarez.Messis goal came at the end of a length-of-the field counterattack, which started after a City free kick was cleared. Citys defending was reckless, with its deepest defender 10 meters inside Barcelonas half when Messi fired a crossfield pass toward Neymar to instigate the move.Neymar ran to the edge off the area and timed his pass perfectly to the onrushing Messi, who took the ball in his stride before gliding between two defenders and placing a low shot inside the near post.ddddddddddddThe turning point in the match was an error from Barcelona right back Sergi Roberto, whose inside pass to Sergio Busquets was wayward and collected by Sergio Aguero. He slipped in Raheem Sterling, who had the vision to slide a cross over to Gundogan to tap in left-footed at the far post.When you concede a goal in that way, it is normal that you go through a bad period, Luis Enrique said.That bad period lasted the rest of the game.Barcelona was without defenders Gerard Pique, Jeremy Mathieu and Jordi Alba through a mixture of injury and suspension, as well as injured playmaker Andres Iniesta. Those losses told in the second half, when the makeshift defense made errors and Busquets -- the usually unflappable deep-lying midfielder -- was swamped and rattled.De Bruyne, pushed into a more central and attacking role for the second half, was at the heart of everything, on and off the ball.Following Busquets foul from behind on David Silva, De Bruyne curled a 25-meter free kick over the wall and beyond flailing goalkeeper Marc-Andre ter Stegen, whose slight sideways movement as De Bruyne approached the ball appeared to unbalance him.The Belgium playmaker then provided a stunning through-ball to Jesus Navas in the lead-up to the third goal, which was slammed in by Gundogan from close range in the 74th. Navas cross hit the arm of Aguero, who had the goal at his mercy, but the ball fell kindly for Gundogan to slam home from close range.We started a bit nervously, Gundogan said, but after we scored, we had our confidence back and the second half was incredible. We dominated Barcelona.City will advance with a draw at third-placed Borussia Moenchengladbach in round five, provided Barcelona doesnt lose at Celtic. Barcelona only needs a point to secure a place in the knockout stage for a 13th straight season. ' ' '