Tennis: Kerber issues Australian Open warning with Sydney triumph

SYDNEY (Reuters) - Former world number one Angelique Kerber continued her 2018 resurgence with a 6-4 6-4 win over Ashleigh Barty in the Sydney International final on Saturday, giving herself a welcome boost ahead of next week’s Australian Open. The German two-time grand slam champion, currently ranked 22nd in the world after a disappointing 2017 campaign, registered her ninth win in as many matches this year with another clinical performance against the local favorite. It was the first indivi...