STUTTGART: Former Stuttgart champion Laura Siegemund will face world number one Ashleigh Barty of Australia in the second round of the clay-court WTA tournament after seeing off qualifier Mona Barthel on Tuesday (Apr 20). Siegemund, 33, who won the Stuttgart tournament in 2017 and reached the 2016 final, needed just over two hours to seal a 6-4, 3-6, 6-1 first-round win over Barthel, who fired down four aces without reply. Barty will make her debut in Stuttgart in the second round against the