The Manchester derby on Super Sunday may not be as pivotal in the title race as in previous seasons, but it still remains one of the biggest games in the Premier League calendar with both teams keen to get one over their city rivals. The key to who comes out on top in the 171st derby in all competitions could be the form of the two goalkeepers, who have become mainstays of this fixture in recent seasons.Since joining Manchester United in the summer of 2011, only David De Gea and his Man City counterpart, Joe Hart, have played every minute of all nine Premier League meetings. In those games, it is clearly the England international who comes out on top with more clean sheets and fewer goals conceded than his opposite number. Last nine Manchester derbies (Premier League only) Stat Joe Hart David de Gea Goals conceded 10 21 Clean sheets 4 1 Saves 20 20 Save percentage 66.7% 48.8% In general, Hart has an excellent record in Manchester derbies having won six of those nine meetings, and no City player has won more Manchester Premier League derbies than Hart. Premier League wins in Manchester derbies Man City player Wins Joe Hart 7 Vincent Kompany 6 James Milner 6 Samir Nasri 6 Yaya Toure 6 Across the Premier League, Hart is also having another good season. The 28-year-old, who has won the Golden Glove award for most clean sheets a record four times, again tops that ranking, with De Gea joint-third. 2015/16 Premier League clean sheets Player Team Clean sheets Joe Hart Man City 13 Petr Cech Arsenal 12 Jack Butland Stoke 10 David de Gea Man Utd 10 Heurelho Gomes Watford 10 Hugo Lloris Tottenham 10 Kasper Schmeichel Leicester 10 While the importance of Hart to Manuel Pellegrinis team cannot be underestimated, the same is true for De Geas importance to United. Since returning to the side after signing a new deal with the club in September, the 25-year-old is the only United player to start every Premier League game. Its quite some statistic given Louis van Gaal has used a league high 33 different players this season. Premier League starts for Man Utd since September 11 Player Starts David de Gea 25 Daley Blind 23 Chris Smalling 23 Anthony Martial 22 Juan Mata 22 The Spaniard has been an important part of the Premier Leagues second tightest defence this season and has kept the third most clean sheets in Premier League history for United. Manchester United goalkeeper comparison (Premier League only) Player Clean sheets Completed games Games per clean sheet Peter Schmeichel 112 247 2.21 Edwin van der Sar 90 183 2.03 David de Gea 56 155 2.77 Fabien Barthez 30 84 2.80 rOY cARROLL 24 46 1.92 De Geas first league involvement in the Manchester derby was the infamous 6-1 defeat at Old Trafford in October 2011 and although their noisy neighbours have had the better of recent meetings, winning six of the last nine in the League, Uniteds No 1 will be hoping to build on his first clean sheet in this fixture in the goalless draw at Old Trafford in October.However, he is likely to be up against an in-form Sergio Aguero, who has scored eight goals in eight appearances in Manchester derbies. Indeed, no player has scored more Premier League goals against De Gea than the Argentina international (seven). Joe Hart of Manchester City and David De Gea of Manchester United By contrast, Hart will be happy Wayne Rooney is absent with a knee injury as no player has scored more league goals against him than the England captain (six).Both Manchester teams have been involved in a Premier League high five goalless draws this season, due in no small part to the form of their respective goalkeepers. Another clean sheet would be welcomed by both custodians, but the viewing public will be hoping at least one of the goalkeepers will be beaten on to extend a run of no consecutive goalless draws in this fixture that has stood since 1973-74.Watch the Manchester derby live on Sky Sports 1HD from 3.30pm on Super Sunday Also See: Stats show Kompany concern 2016 Premier League table Cheap Nike Kyrie Irving Basketball Shoes China . - The Oakland Athletics say they are stopping negotiations to extend their lease at the Coliseum. Cheap Basketball Shoes China . Its Wu-Tang and Outkast in the final. 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SAN FRANCISCO -- As hard-hitting safety Donte Whitner headed out of the Bay Area for his hometown of Cleveland, the San Francisco 49ers wasted little time finding someone to fill his position. Safety Antoine Bethea agreed to a $23 million, four-year contract with the Niners on Tuesday as the NFLs free agency period began, and then the 49ers acquired offensive tackle Jonathan Martin from the Miami Dolphins on Tuesday night to reunite him with former Stanford coach Jim Harbaugh. Bethea announced on Twitter he had joined the 49ers, saying: "Glad to be a Niner!! Going to the Bay!!!" A person with knowledge of Betheas contract provided details of the financial terms, speaking on condition of anonymity because they werent announced and the 49ers had yet to acknowledge the signing. Also Tuesday, veteran place kicker Phil Dawson received a new two-year contract after a sensational first season in San Francisco. Dawson announced on his Twitter page that he had re-signed, then the team made it formal. The sides had discussions over the past two weeks. "My experience being on the inside did nothing but confirm what I already knew to be true, that San Francisco is a super attractive place to play and my experience last season only furthered that notion in my mind," Dawson said. "Coming into free agency, my No. 1 goal was to remain a 49er. Fortunately that was able to work out." Whitner, meanwhile, announced on Twitter he would join the Browns: "To all my former teammates and coaches. I love you all! I will always cherish you guys!" he wrote. And linebacker Patrick Willis wrote on Twitter, "Man (at)DonteWhitner u will be missed G." For the second straight March, San Francisco watched a top safety leave for a big contract elsewhere. Last year, Dashon Goldson departed for Tampa Bay and 2013 top draft pick Eric Reid replaced him. The 29-year-old Bethea had 110 tackles, two interceptions and a sack last season, his sixth straight year starting every game for the Indianapolis Colts. "The thing I love about the 49ers is when they lose someone they pick someone up, which we certainly did that with Antoine," Dawson said. "Im excited to get to know him and certainly Ive followed him through the years. Were going to try to keep on plugging forward and keep on getting better." The 49ers secondary also lost cornerback Carlos Rogers after three seasons Tuesday, an expected cost-cutting move by the team. Cornerback Eric Wright posted a photo on his Instagram account via Twitter of a new 49ers contract, but the team didnt confirm he had received a new deal.dddddddddddd San Francisco also acquired quarterback Blaine Gabbert from Jacksonville for a sixth-round draft pick this year and a conditional pick next season, apparently finding a capable backup for Colin Kaepernick. The deal was pending a physical. Gabbert started the first three games for Jacksonville last season before being benched in favour of Chad Henne, re-signed Friday to a two-year contract worth $8 million. The 24-year-old Gabbert was the 10th overall draft pick in 2011 out of Missouri. He has thrown for 22 touchdowns in three NFL seasons, completing 414 of 777 passes for 4,357 yards in 28 games and 27 starts. "We thought highly of Blaine as an early entry into the 2011 NFL draft," 49ers general manager Trent Baalke said. "He is a high-character individual that will be given every opportunity to develop within our system and we are looking forward to working with him." Bringing back Dawson has been a top priority for both sides for months -- with Harbaugh saying, "pay the man" -- and it got done quickly. The 39-year-old Dawson was a big reason the 49ers returned to the NFC championship game. In his first year with the 49ers following 14 seasons in Cleveland, Dawson converted 32 of 36 field goals and set a franchise record with 27 successful field goals in a row. "Phil has been a consummate pro and clutch performer his entire career and we are pleased that he has chosen to continue on with the 49ers," Baalke said. "It was important to this organization to have a veteran kicker like Phil as we enter our first season in a new stadium." The 49ers move into the new $1.2 billion Levis Stadium at team headquarters this year. Soon, Dawson will return from his family home in Austin, Texas, to start practicing at the new stadium, where the NFLs first automatic collapsible goal posts were installed last week. Dawson plans to keep playing as long as he can maintain his high level. "I want to be a difference-maker for my team," he said. "Signing this contract I fully expect to live up to those standards and then some." With Rogers departure, San Francisco cleared $5.1 million in salary-cap room. The 32-year-old Rogers, who missed time late in the season with a strained right hamstring, had 47 tackles and two interceptions last season. Rogers received a $31.3 million, four-year contract in March 2012 and was due to earn $6.6 million in 2014. The 49ers announced they tendered one-year contracts to restricted free-agent tight end and defensive tackle Demarcus Dobbs and exclusive rights free-agent linebacker Michael Wilhoite. ' ' '