CONCACAF spokesman Brent Latham said he couldn’t confirm at this time that a formal investigation is underway.

Gonzalez, who had scored the first goal in the 2-0 victory at Lincoln Financial Field, appeared to have been bitten on the back of the right shoulder by Darwin Ceren in the 81st minute.

“I was a bit shocked,” the 6-foot-5 defender said. Ceren was not disciplined by Canadian referee Drew Fischer, who apparently did not witness the incident.

The USSF took a photo of the bite marks after the match but did not make it public.

Also in the second half, El Salvador’s Henry Romero appeared to bite Altidore on the back of the left shoulder and, in another moment, reach around the U.S. striker and pinch his left nipple. A minor scuffle ensued after the second incident. Apparently no photo exists of any possible bite marks.

The biting incidents rekindled memories of Luis Suarez, the Uruguayan striker who was suspended for four months for biting Italy’s Giorgio Chiellini during the 2014 World Cup.

Altidore joked about nipple-gate afterward, saying: “My girl is mad at me. She’s mad at me, she’s mad at Romero. She’s like, ‘Only I can bite you, only I can grab your nipples.’ … It’s never happened [to him] before, but in CONCACAF, it never ceases to amaze me. ”

Had Altidore retaliated at full force, he might’ve received a red card and missed the semifinal Saturday against Costa Rica in Arlington, Tex.

Altidore said he “barely” kept his composure. “You’ve got to keep your cool because these things happen. I shouldn’t be saying these things happen, but they do.”

Perhaps unaware of the specific biting incidents, El Salvador Coach Eduardo Lara said of the ornery match: “These things always happen in football.”

The match was marred by 45 fouls (26 by El Salvador) and five yellow cards (four to El Salvador).

The Gold Cup disciplinary committee reviews match reports to determine if the officiating team and match commissioner have reported any incidents needing further investigation, Latham said.

“If a potential incident not reported by the match referees and/or the match commissioner comes to the attention of the disciplinary committee,” he added, “the committee has the option to review video and other evidence to determine if the commencement of a disciplinary process is warranted. They would be gathering evidence at this point if they have detected a potential incident.”