Marcus Rashfords extraordinary breakthrough continued with a decisive goal in his first Manchester derby. Here, we take a detailed look at the teenagers match-winning display as United claimed an invaluable 1-0 victory over their noisy neighbours… Rashford decides derby Marcus Rashford scored on his Manchester derby debut to down City. Who better to settle a Manchester derby than the only local lad on the pitch? With a blistering turn of pace and a cool finish beyond Joe Hart, Marcus Rashford reignited Manchester Uniteds top-four challenge and became the youngest player ever to score in a Premier League meeting between the two sides.After netting twice on his debut against Midtjylland and adding two more on his Premier League bow against Arsenal, this was Rashfords fifth goal on his eighth consecutive start for United. It was a handsome reward for Louis van Gaals unwavering faith in 18-year-old, and Citys beleaguered defenders would surely testify that this was his best display yet. No one suffered more than Martin Demichelis. The Argentine centre-back has enjoyed a long career at the top of his profession, but age didnt so much catch up with him as run him into the ground at the Etihad Stadium. Rashford targeted the 35-year-old repeatedly until he was mercifully substituted in the 52nd minute, and never was the mismatch more obvious than for the goal. Marcus Rashford finished off a flowing Man Utd move for the winning goal Sixteen minutes had passed when Juan Mata played a one-two with Morgan Schneiderlin in midfield before sliding a pass into the feet of Rashford. The striker had plenty left to do, but he effortlessly controlled the ball with his left foot before breezing away from Demichelis feeble challenge and sending a right-footed finish beyond Citys advancing goalkeeper.Direct, incisive and clinical. It was a world away from the laboured attacking that has been typically associated with United for so much of Van Gaals tenure, and it left Demichelis in a heap on the turf as Rashford wheeled away in celebration. LVG: Rashford a real striker Louis van Gaal was full of praise for Marcus Rashford after the Manchester derby. He left him for dead, noted Jamie Carragher in the Sky Sports studio. Demichelis must have been having nightmares at half-time. Former Manchester City striker Niall Quinn was equally impressed: He had no fear. As soon as it came to him, he thought: Im going to get at him, I know I can get at him, and of course he does and he puts in a brilliant finish.The goal set the tone for what was to follow. Rashford repeatedly positioned himself the left-hand channel between Demichelis and Bacary Sagna, and the tactic nearly paid off again when he drew a clumsy foul from the Argentine which should have been rewarded with a penalty in first-half stoppage time. Martin Demichelis appeared to foul Rashford in the penalty box Well over 50 per cent of Uniteds attacking play came down the flank occupied by Rashford and Anthony Martial, and the formers movement was a constant threat to a defence robbed of first-choice centre-backs Vincent Kompany and Nicolas Otamendi.Thats intelligence, said Carragher. Thats something the manager must have spoken about before the game; that he wants him in that inside-left channel. Thats where all the problems were caused. Man Utd targeted Citys right flank with Rashford and Anthony Martial Rashford didnt see as much of the ball as Manchester City pressed for an equaliser in the second half, but his pace provided a valuable outlet on the break and it was no surprise that he clocked the highest top speed on the pitch at 34.41km per hour.And with Martial and Lingard on either side, United possessed the kind of youthful dynamism City sorely lacked in the final third. I think United will be encouraged from the way the young guys played in the first half, said Graeme Souness. It showed they had pace and imagination. Sky Sports pundit Graeme Souness says Manchester United boss Louis van Gaal deserves credit after sticking with his young side against City Van Gaal was understandably delighted, and there was special praise for Uniteds new hero in his post-match interview with Sky Sports. Hes a real striker, he said. Thats why I let him stay in that position, because he can make goals but he is also an attacking point and he also runs the channels. I like him very much.Van Gaal could have added stamina to Rashfords growing list of attributes. The youngster pulled up with cramp when chasing down a long ball in the 86th minute, but in the sixth minute of stoppage time he still found the resources to sprint half the length of the pitch to win a corner. Even with cramp he could still run, said Van Gaal. I have never seen that.Rashford has now scored more goals in his first eight United appearances than either Wayne Rooney, Robin van Persie or Martial. Van Gaal was quick to point out that his consistency will be tested in the weeks ahead, but it feels like there are more surprises to come.Uniteds local hero is only just getting started. Louis van Gaal hits out at media criticism of Marcus Rashfords recent formAlso See:Rashford claims derby spoilsSouness: LVG deserves creditLVG: Rashford a real strikerPremier League tableHydro Flask 40 Oz Straw Lid Sale . Gerald Green and Miles Plumlee? Green had bounced around the NBA when he wasnt playing overseas. The Pacers gave up on Plumlee after just one season. Now Green and Plumlee are key cogs in the Suns surprising breakout season. 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Hydro Flask 32 Oz Canada . -- Al Jefferson found a groove just in time for the Charlotte Bobcats.SEOUL, South Korea -- South Korean police say they have investigated a baseball player who confessed to his team about match-fixing.The investigation of Yoo Chang-sik, a left-handed pitcher for the Kia Tigers, came four days after prosecutors indicted two other players on match-fixing allegations.According to police, Yoo told investigators Monday that he deliberately allowed walks in the first innings during two games in 2014 when he was playing for the Hanwha Eagles.Police cited Yoo as saying he took a total of $2,640 in return from a bbroker.ddddddddddddThe Korean Baseball Organization previously said that Yoo had reported to his team that he manipulated one game.Police said they will likely request prosecutors to indict Yoo.South Koreas major professional sports leagues, including baseball and soccer, have been rocked by match-fixing scandals in recent years that have led to jail sentences and lifetime bans of several players and coaches. 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