American Tyler Kleven, left, looks for the puck after checking Slovakia’s Samuel Knazko to the ice in their game at the IIHF World Junior Hockey Championship in Red Deer, Alberta, on Sunday. (Jonathan Hayward/The Canadian Press via AP)

The pandemic disrupted a pair of top events in international hockey Tuesday, with the two top women’s teams in the world calling off their final pre-Olympic tune-up games and the defending champion U.S. men forfeiting a game at the world junior championship.

Hockey Canada announced the final two rivalry series games against the U.S. were canceled because several players and staff on Canada’s women’s national team are in COVID-19 protocol.

“The risk associated with playing the final two Rivalry Series games with less than one month before our teams are set to compete in the 2022 Olympics is too high to finish our series with the United States,” Hockey Canada director of hockey operations Gina Kingsbury said. “We need to do what is right for our athletes from a health perspective and for our team preparation in order to ensure everyone remains healthy and eligible for Beijing.”

The U.S. and Canada were set to play Monday in Edmonton, Alberta, and Jan. 6 in nearby Red Deer. Canada had won four of the six exhibition games between the two rivals this fall and early winter.

USA Hockey director of women’s national team programs Katie Million said the organization agreed with Hockey Canada that it was appropriate to cancel the games.

Hours earlier, the U.S. was forced to forfeit its world junior game Tuesday against Switzerland after two players tested positive for the coronavirus. The tournament is also taking place in Edmonton and Red Deer.

Two positive COVID-19 test results led to a mandated team quarantine, and the U.S. as a result was unable to play under tournament rules.

“We’re extremely disappointed, especially for our players,” U.S. national junior team general manager John Vanbiesbrouck said. “We’re operating an ever-changing landscape, and that’s very challenging.”

The International Ice Hockey Federation said the team’s quarantine status will be evaluated later to determine the status of the Americans’ next game scheduled for Wednesday against Sweden. Switzerland was awarded a 1-0 victory over the U.S. from the forfeit.

The U.S. is the defending champion at the tournament for the world’s best men’s hockey players under age 20. The U.S. beat Slovakia 3-0 Sunday night in its first preliminary round game.

Teams that traveled to Canada quarantined for two days after their Dec. 15 arrival with just over 5,800 tests conducted on 462 players, staff, and game officials before the tournament opened Sunday, according to the IIHF.

One Finnish player tested positive and was placed into isolation with no others on the team impacted. Two game officials were isolated after testing positive during quarantine.