PITTSBURGH -- Pittsburgh Pirates second baseman Neil Walker understands not everybody is going to be a fan of Major League Baseballs expanded replay system, which threatens to slow down a sport that already struggles to be played with any sort of urgency. Funny, there werent many critics to be found on Monday at PNC Park. Walker homered off Carlos Villanueva leading off the 10th inning, and the Pirates benefited from an overturned to call to beat the Chicago Cubs 1-0. The Pittsburgh native turned on a Villanueva changeup and sent it sailing over the Clemente Wall in right field for the first walk-off of his career and the first by the Pirates on opening day since Bob Bailey homered off San Franciscos Juan Marichal in a 1-0, 10-inning victory in 1965. "This one feels pretty special," Walker said. "This is a special day for this team, this organization. Weve come a long way." So has the game. After spending decades fighting the advances of technology, Major League Baseball has embraced the concept. Many calls can be challenged this season under an expanded system, and both teams wasted little time putting umpires to work. The Cubs made history by initiating the first review under the new guidelines. Chicago manager Rick Renteria challenged a double-play call in the top of the fifth following a demonstrative "safe" call by Jeff Samardzija following a poorly executed sacrifice bunt attempt. First base umpire Bob Davidsons decision was confirmed on replay. "It was a combination of Samardzjias reaction and what we were looking at," Renteria said. "Were still trying to figure out what clear and compelling evidence is. Its a work in progress." Chicagos luck with replay didnt get any better later. A safe call on a pickoff attempt by Bryan Morris (1-0) with one out in the top of the 10th was reversed after Pirates manager Clint Hurdle requested a replay, sending Chicagos Emilio Bonifacio back to the dugout after a delay of 2 1/2 minutes. "Most of the time on pickoffs, its got to be very noticeable for the umpire," Morris said. "Those bang-bang plays are always going to go to the runner. I guess thats why its good to have replay." The largest regular season crowd in PNC Parks 14-season history (39,833) roared its approval. The din only grew louder when Walkers drive to right field finished halfway up the seats. That capped a giddy day for a team freed from two decades of losing after a breakout 2013 in which it won 94 games and made the playoffs for the first time since 1992. Former Pittsburgh star Barry Bonds presented centerfielder Andrew McCutchen with the NL MVP award that McCutchen earned last year. Bonds received mixed reviews, though the vitriol that accompanied his late career visits to Pittsburgh while playing for San Francisco was noticeably absent. Bonifacio went 4 for 5 for Chicago, but the Cubs were 0 for 11 with runners in scoring position and wasted a fine start by Samardzija, who scattered five hits over seven innings. "I was happy with the way I kept the ball down in the strike zone," Samardzija said. "It helped to get the double plays because they made the overall outing look a little better than it really was." Travis Ishikawa had two of the six hits by Pittsburgh. Starter Francisco Liriano tied a team record shared by three other pitchers for most strikeouts on opening day by fanning 10 in six innings. While he struggled with his command -- needing 104 pitches to get 18 outs -- he was sharp when he needed to be and Pittsburghs bullpen did the rest. NOTES: Pirates C Chris Stewart took batting practice and says he is coming along ahead of schedule in his rehab from knee surgery. Stewart believes he can beat the timetable of late April for his return. ... Chicago OF Brian Bogusevic was unavailable because of ankle soreness. He is expected to be ready to play Wednesday. ... The teams are off Tuesday. Chicagos Edwin Jackson faces Pittsburghs Charlie Morton on Wednesday night. Stitched Los Angeles Rams Jerseys .com) - World No. 1 Rafael Nadal, Wimbledon champion Andy Murray and four-time Australian Open titlist Roger Federer were among Mondays fourth-round winners at Melbourne Park. Cheap Los Angeles Rams Gear . -- The Vancouver Whitecaps remained unbeaten with a scoreless draw at the New England Revolution on Saturday. http://www.ramscheap.com/. Cristiano Ronaldo, Gareth Bale and Karim Benzema scored two goals each Wednesday night in a 6-1 rout of Schalke in the first leg of their second-round matchup. "We played a very, very good match," Madrid coach Carlo Ancelotti said. "We got well into the match, scored two early goals and that opened the game and left us able to counter and to use the speed of our players. Discount Los Angeles Rams Jerseys . Still, Milan remained five points behind city rival Inter Milan in the race for fifth place and the final Europa League berth, after Inter beat 10-man Parma 2-0. Meanwhile, Paul Pogba led the way as Juventus stayed on course for a third consecutive title with a 1-0 win over relegation-threatened Bologna. Custom Rams Jerseys . Vonn "reopened" the idea of competing in the season-opening World Cup event on Oct. 26-27 in Soelden, Austria after returning to the slopes last month in Portillo, Chile.MELBOURNE, Australia -- Karrie Webb won the Womens Australian Open for the fifth time Sunday, shooting a 4-under 68 in the final round to beat Chella Choi by one stroke. Webb birdied the 18th hole to take the outright lead, then watched as Choi, who shot a course-record 62 on Saturday to take a share of the third-round lead, pushed a 10-foot putt wide of the hole at 18 to miss the chance for a playoff. Webb, who clinched her 40th LPGA title, finished at 12-under 276 overall. She previously won the Australian Open in 2000, 2002, 2007 and 2008. "I got off to a great start and I just did a great job mentally today," Webb said. "I cant think of another time when I held myself together as well as that." The win marked a remarkable change of fortune for the No. 8-ranked Australian, who was disqualified from last weeks Australian Ladies Masters after signing an incorrect scorecard. She had been the defending champion at the event. Webb started five shots off the lead Sunday, but made six birdies and only two bogeys as the other leading challengers struggled in a strong wind on the Victoria Golf Club course. "I was happy to see the conditions were going to be a little tougher today," Webb said. "I felt like that gave me a chance to make up some ground." Choi had played 14 holes and was at 11 under when Webb finisheed her round, leaving the Australian with an anxious wait to see whether her score would hold up.dddddddddddd But the South Korean, who had two eagles and six birdies in her record-setting third round, couldnt make a birdie on the back nine Sunday. "When youre on the course you feel like you have some control, but when youre done you have no control and you just have to wait and see," Webb said. "I actually thought once Chella had that putt on the last, Ive played with her quite a bit and I was expecting that one to go in." Choi was trying to win her first LPGA title. World No. 2 Suzann Pettersen of Norway faltered in her bid to take over the top ranking from South Koreas Inbee Park. Pettersen, who started the day three shots off the pace in fourth place, needed to finish first or second to pass Park, but had three double bogeys in a final round 80 to drop back into a tie for 28th. Sixteen-year-old Lydia Ko of New Zealand, the world No. 4, was also unable to challenge Webb, struggling with her putt on the back nine and shooting a 73. She finished tied for third with American Paula Creamer (68) and Frenchwoman Karine Icher (71). Seventeen-year-old Australian amateur Minjee Lee, the co-overnight leader, had seven bogeys and a double bogey in an error-filled final round of 78. She finished in a share of 11th place. 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