"She has just been in Copenhagen, and here I trained with her three-four times," says the former Danish top player Michael Mortensen to B. T.

He does not hide that he is impressed.

"Caroline hits the ball great at the moment. It was impossible to see that she had kept tennispause since the China Open in early October," says Michael Mortensen, who in his active career was among the world's best players in men's doubles.

After the training in Denmark's Caroline Wozniacki traveled to Miami in the u.s. state of Florida.

"Here is the plan, that she has the last preparations, before she in the days after the new year travel to New Zealand to participate in the new season's first tournament in Auckland," says Michael Mortensen.

Yet, Caroline Wozniacki not reported other than that she is in January – in addition to the WTA-tournament ASB Classic – play an exhibition match in Melbourne against Maria Sharapova as a prelude to the Australian Open.

"The times I trained with her, she appeared fit. So immediately assessed, I think, that there is reason to look with optimism on her startup program in 2020," says Michael Mortensen.

Caroline Wozniacki ends 2019 as number 37 on the WTA's world rankings in the ladies'.

This is her worst ranking since 2007, where she ended the year as number 64.

"That she should not allow themselves to be influenced negatively. The reason for the decline is that she has been plagued by illness and injuries. Her spillemæssige level is still so high that she can play with on finalesejren in every tournament she participates in," says Michael Mortensen.