Oxygen was at premium for Broad Run junior Kaitlyn Ferrara in her first-ever start as a varsity soccer goalie. Because of injuries to the Spartans’ top two goalies, Ferrara was thrust into the starting lineup on Monday against Stone Bridge, a team that boasts two All-Met forwards, Ashley Herndon and Murielle Tiernan, and was in­cred­ibly nervous.

“I don’t think I was breathing that whole game,” Ferrara said.

In a out-of-district matchup between two powerhouse soccer teams that finished in the Post’s Top 10 last season, Ferrara came up with eight important saves to help the Spartans secure a 0-0 double-overtime tie against the Bulldogs.

The Spartans were playing without four players, three of them starters, on Monday. They also were adjusting to the loss of five starters from last year’s Virginia AA championship team, including two graduated All-Met players, Ellie Zoepfl and Player of the Year Whitney Church. Broad Run (1-2-1), which won an unprecedented fourth straight AA title last spring and reigned atop the AA Dulles District for years, is now playing in the AAA Cedar Run District.

“I didn’t know we were going to overtime and then I finally took a breath,” Ferrara said. “And then I hear overtime and I was just so scared. I was nervous all day for this game, Stone Bridge is really good and it was my first game.”

Ferrara and the Broad Run defense, led by juniors Jessica Glaudemans and Katherine Pieper, turned back several shots by Stone Bridge (1-0-2) and limited its powerful attack led by Herndon and Tiernan, who combined for 39 goals last season and helped lead the team to a AAA title in 2010.

“My defense was amazing tonight I was so glad I had them in front of me,” Ferrara said.

Added Stone Bridge Coach Joan Windows: “We’re still learning to play with all our pieces. With Murielle and Ashley, teams focus so much on them up there. So it’s hard to score.”