O’Hara wasn’t doing well after the incident, coach Jill Ellis told the Fox broadcast at the half, and the U.S. made the decision to bring in Krieger, who until this point had been dormant in the team’s World Cup campaign. Fox later reported O’Hara was showing symptoms of a concussion after being evaluated by the team’s medical staff in the locker room.Start of the second half, Kelley O’Hara has been replaced by Ali Krieger after this nasty clash of heads.(via @TelemundoSports) pic.twitter.com/QcefzAOkJN— The18 (@the18com) July 7, 2019Krieger played in the 2015 cup, where the USWNT won its third world title, and the 2019 Olympics. But since then, she has been absent from the international team.In 2017, Krieger received limited call-ups and only appeared in two games. Then, after not receiving a call-up for 18 months, she was included on the USWNT roster for friendlies against Australia and Belgium as the team prepared for this year’s cup. Ali Krieger got called up in the United States women’s national team’s biggest moment Sunday.The experienced international player replaced Kelley O’Hara in the backfield after O’Hara was at the receiving end of a nasty head-to-head collision just before the half. Ellis and company made the decision to bring the veteran, with 102 caps, on board despite making just one international appearance in the past 25 months.Krieger was named to the final 23-player squad which marked her third World Cup appearance.