The margin for error in the Class 5A Region I girls soccer playoffs turned out be miniscule. One slight letdown could cost a team its season.And that’s what Grapevine endured in its 1-0 season-ending loss to Hebron the Region I quarterfinals. A defensive lapse midway through the first half was all the Lady Hawks needed to keep the Lady Mustangs (19-5-4) from advancing to the Region I tournament in North Richland Hills.“We didn’t capitalize on several opportunities in the first half,” coach Ryan Davis said. “We pressed really well. But they got a good counter down our right side that came off our corner kick. Some of our defenders did not react the way we needed them to.“They combined on two passes across the middle. The last one was nice deflection from about 8-10 yards that beat Taylor Braun. We were not good in that moment. We flinched.”Beyond those 15-20 seconds, Davis couldn’t have asked for a better effort. Grapevine could not mount anything effective in the second half and never really had any good looks, Davis said. But there was one moment that could have meant the Lady Mustangs shooting to try and tie the game.“Kendall Vardell had moved behind their defender, and it looked like she got clipped, because she went down,” Davis said. “It definitely was in the box, and we thought it should have been a penalty kick. To me, it looked like the officials missed the call. But if we convert on any of our chances in the first half, we’re not talking about this.”Hebron, which wound up losing to Carroll in the Region I semifinals, 2-1, brought a physical team into the playoffs and had already defeated Colleyville Heritage, 1-0, in the bi-district round. Davis didn’t feel like his team had any overall problems against it. There were some off moments but his group found a way to get beyond them. Even though his team gave up some size, he thought it played as physical a game.Outlining the futureWhile the season has finished, Davis feels pretty good about the youth that remains in the program. The Lady Mustangs will lose Vardell, defender Morgan Howard, sweeper/defender Bridget Hamway and reserve midfielder Ashley Rice.All of them provided good minutes, but Davis expects the bulk of the scoring from the likes of sophomore midfielder Hayley Bargery, Jordan Slim and center forward Brooke Ramsey. There’s also going to be defensive help in junior centerback/center midfielder Tory Bowman.Plus, sophomore Reilly Ott and junior Taylor Braun, who has already verbally committed to Kentucky, are going to be presence both in the net and offensively. Each has the flexibility to play anywhere on the field. Remember Braun was used in the shootout area playoff win over Midlothian.“I told the girls after the game I was proud of their season, and they should be too,” Davis said. “The thing I’ll take away from this year was how this group persevered and how its cohesiveness built over time. We blended as a team and stayed focused.”Also, the program will carry the 36-game unbeaten district winning streak into the 2014 season.