Tennis star Naomi Osaka announces she is pregnant

More from World Sports

• UFC president Dana White does not expect punishment for domestic violence incident

• Lionel Messi scores for Paris Saint-Germain in first game back since World Cup triumph

• Zach Johnson isn't discounting Tiger Woods for the Ryder Cup

• Australian Open draw: Rafael Nadal begins title defense with tough test in opening round

• The Boston Celtics become the first team to hit 30 wins this season with victory over the New Orleans Pelicans