EAST RUTHERFORD, N.J. -- Tom Coughlin doesnt have many options at halfback for the winless New York Giants. The choice now is rookie Michael Cox, and thats it. Veteran Brandon Jacobs, who ignited the running game for the first time this season in a 27-21 loss to the Chicago Bears on Thursday night, has a tweaked left hamstring. He did not practice on Monday as the Giants (0-6) started work for next Monday nights game against the Minnesota Vikings. Jacobs insists he will play. Cox said he is ready. David Wilson and DaRel Scott are major question marks. Wilson, the No. 1 back to start the season, was in California on Monday having a troublesome neck injury examined. Scott has a bad hamstring injury and appears to be out for Minnesota. Things were so bad before last week that backup linebacker Allen Bradford ran a few plays as a halfback with the scout team. Coughlin joked Monday when asked if he was concerned about his halfback situation. "What do you mean?" he said. "We had one. Were all set." Besides Cox, Coughlin also has fullback John Conner in the backfield. Sitting in front of his locker, Jacobs smiled when asked about his hamstring, which was hurt on a night he carried 22 times for 106 yards. It was the first individual 100-yard rushing effort by a Giant this season, and Jacobs first 100-yard game since 2010. It came on a night New York ran for a season-high 123 yards. "Im not missing any game," Jacobs said. "Straight up, thats all there is in a nutshell. I am not counting on being down." Jacobs said the trainers advised him not to practice Monday and he has been told his injury is day to day. The 31-year-old Jacobs surprised a lot of people with his performance. He ran hard. He had great second effort. He also showed he could get into the end zone, twice carrying Bears defenders to pay dirt. "Its not about proving to everybody," said Jacobs, who barely played after signing with San Francisco as a free agent last season. "I dont care to prove to anybody. All I need to do is show the guys in this locker room and the coaching staff what I have to do." On the other hand, Cox has to prove himself. The seventh-round draft pick is still trying to learn the offence. "Hes young," Coughlin said. "Its sophisticated and complex the things that are thrown at him, particularly in the protection area, so youve got to be careful." The bottom line is the Giants dont want Eli Manning getting hurt because Cox missed a blocking assignment. "I feel like Im ready to go, but obviously Im just working on everything, pass protection, just watching more film and the whole offence, everything," Cox said. Centre Jim Cordle said the offensive line got a chance to work with Cox on Monday. Cordle said the 24-year-old who has yet to carry the ball in the regular season is a fast, physical back. "He is talented, but I am sure Brandon will play," Cordle said. "You saw how much he loves playing and how much he wants to be here. If those are the two guys, well go with them." Scott also injured his hamstring against the Bears. He had a hard time walking up steps after watching practice Monday. The biggest concern is Wilson, the Giants first-round draft pick last year. He hurt his neck getting tackled against Philadelphia on Oct. 6. He briefly lost feeling but walked off the field. There is some concern he has had a narrowing of his spinal column, and that was being looked at in California. Wilson was optimistic about his condition on Friday. Coughlin said Wilson overcame a similar injury in college. The Giants were not certain whether they would have an update on Wilsons injury on Monday. The halfback situation should improve after the eighth game, when halfback Andre Brown is eligible to come off injured reserve. He broke his left leg for the second time in less than a year in the preseason finale against New England. Jerseys China Cheap . PETERSBURG, Fla. Cheap Jerseys Free Shipping . 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Probably one of his biggest since reaching the final in New York in 2014.And it was impressive, coming over four hours and from two sets to one down. But was it, as Japanese tennis veteran Kimiko Date-Krumm suggested, a victory that proved the 26-year-old Nishikori has reached a different dimension? For many the jury is still out.Not that Nishikori has not been successful already. He has won 11 career titles, an Olympic bronze medal, reached the final of the US Open, made three Masters finals, and hit as high as No 4 in the world. But there has been a common theme that seems to have prevented any further progress: fatigue or injury.In the 2014 US Open final he was beaten in straight sets by Marin Cilic, saying afterwards that his body was heavy. After losing in the semi-finals in New York to Stan Wawrinka this year, he said: I was definitely tired, especially in the end. At Wimbledon he did not look fit from the outset against Cilic and eventually retired at 6-1 5-1 down. Nishikori beat Andy Murray at this years US Open There is no doubting Nishikoris talents, but his progression to the very top has been hampered by consistent injury issues. There is also a question of whether he can physically go the distance throughout the two weeks of a Grand Slam.In 2014, one of his coaches, Dante Bottini, said that part of Nishikoris problem with injuries was mental and he didnt really know how to deal with pain and injury.It was a clearly a priority for Nishikori and his team at the time.If I have one goal for next year that would be for Kei to go out there and play 95 percent of the year healthy, said Nishikoris coach Michael Chang in December 2014. To go through the year without having an injury or something happen that takes you out for two to three weeks at a time would be a huge accomplishment and that alone would take his tennis to the next level. Mark Petchey looks ahead to the ATP World Tour Finals Chang also said that he felt Nishikori had an opportunity to win a major on any surface.dddddddddddd.That challenge, though, has not materialised. While he has performed well at the US Open, he has never made it beyond the fourth round at Wimbledon, has only made one quarter-final at Roland Garros and never progressed beyond the last eight in Melbourne.So what does Nishikori need to do to make the next step up?Perhaps his injuries have just been bad luck. Perhaps he need to lighten his load in 2017 and the years ahead. One aspect that could really help him win a Slam would be his serve Michael Chang I have been playing a lot of matches this year, he said last week. Maybe thats why I have been hurting these couple months, not feeling 100 percent yet.At the moment his body seems as though sometimes it is his toughest opponent.But because of his style of play that might not change. Nishikori does not have a huge serve - of the eight players in London he has the fewest aces in 2016 - and rather he excels with his court coverage and brilliant backhand.But grinding out so many points appears to be taking its toll on the world No 5.Chang admitted earlier this year that one aspect that could really help him win a Slam would be his serve. Michael Chang started working with Nishikori ahead of the 2014 season He added: Its improved a lot over the past couple of years but it still needs to get better and more consistent.Nishikori mixed it up at the US Open by serving and volleying, using the tactic to great effect against Murray in the quarter-finals.Sky Sports pundit Mark Petchey said: Hes definitely trying to protect his serve a bit better this year against obviously great returners.But will that be enough for Nishikori to consistently compete with the best?Ahead of the ATP World Tour finals, he acknowledged: I have to do a little better in the big tournaments, especially the Grand Slams and all the ATP World Tour Masters 1000s.Physically, I got much stronger the last couple of years. I try to work hard every day, try to be confident in every match and enjoy my tennis. Its good motivation.Is motivation enough to see the Japanese make the next step? That remains to be seen.Check our game-by-game coverage from all group matches at the ATP World Tour Finals in London - including Andy Murray - on skysports.com/tennis, our app for mobile devices and iPad and our Twitter account @skysportstennis. Also See: Panel predictions Stan the danger man Murrays year in numbers Tour Finals at The O2 ' ' '