Running backs Ezekiel Elliott and rookie Saquon Barkley will share the spotlight when the Dallas Cowboys and New York Giants renew their NFC East rivalry on Sunday night in Arlington, Texas.Yet the player to watch, according to both sides, is Dallas quarterback Dak Prescott.The third-year quarterback admittedly was “off” in a season-opening 16-8 loss at Carolina. Dallas (0-1) did not make it across the 50-yard line in the first half and Prescott was 11 of 18 for just 100 yards through three quarters, finishing 19 of 29 for 170 yards.”We weren’t as sharp as we needed to be,” said Prescott, who was sacked six times and held under 200 passing yards for the seventh time in his last nine starts. He has thrown more interceptions (nine) than touchdown passes (six) during that span, dating back to Week 10 of 2017.The Giants (0-1) want to force Prescott to beat them through the air, according to safety Landon Collins. After holding Leonard Fournette and T.J. Yeldon to a combined 92 rushing yards on 23 carries in last week’s 20-15 loss to Jacksonville, New York hopes to contain Elliott, the 2016 NFL rushing champion.”We really just have to focus on stopping Zeke. We need to make sure we’re playing our gap assignments and make sure we [take] the air out of their running game,” Collins told reporters. “Put the ball into Dak’s hands and I think we have a better shot at winning.”Careful what you wish for, Giants. Prescott posted his two biggest passing totals in last season’s sweep of New York. He threw for 268 yards and a touchdown in a season-opening 19-3 win at AT&T Stadium and for a career-high 332 yards and three scores in a 30-10 victory in Week 14 at MetLife Stadium.Elliott, who ran for 69 yards and a touchdown last Sunday against the Panthers, has rushed for more than 100 yards in two of his three career contests against New York.