Former world number one Angelique Kerber returns into the German team for a Billie Jean King Cup first round tie in Brazil next month. Captain Rainer Schüttler on Friday nominated Kerber, Tatjana Maria, Laura Siegemund and Anna-Lena Friedsam for the April 12 and 13 tie in Sao Paulo. A fifth player is to be picked at a later stage. Triple grand slam winner Kerber gave birth to a daughter in February 2023 and returned to action in January as part of the German team that won the United Cup. She reached the fourth round in Indian Wells over the past days. “Angie’s return is a big strengthening for…