The NBA postponed three more games and the NHL pushed back the Dallas Stars' season opener again amid a surge of COVID-19 cases that has put professional sports on notice in North America

Two games between the Cleveland Cavaliers and Washington Wizards, set for Sunday and Monday, were put on hold, the NBA said on Friday.

"Because of ongoing contact tracing within the Wizards, the team does not have the league-required eight available players to proceed with the scheduled games against the Cavaliers," the NBA said.