The Upper Austria Ladies Linz "celebrates" the tennis mums

What do Germany's Angelique Kerber, Ukraine's Elina Svitolina, Denmark's Caroline Wozniacki and Japan's Naomi Osaka have in common? They are all tennis players who were high up in the world rankings, have had a baby in recent years and are now back in the "tennis circus" - and for the most part very successfully. Angelique Kerber [...]