British Billie Jean King Cup team captain Anne Keothavong has stated that Emma Raducanu “needs to become more robust” as the former British player acknowledged that the tour is very demanding. Raducanu, 19, made her Billie Jean King Cup singles debut this past weekend. On Friday, Raducanu defeated Tereza Martincova 7-5 7-5 in her first pro clay match. The following day, Raducanu was hampered by blisters and stood no chance against Marketa Vondrousova as the Czech claimed a dominant 6-1 6-1 victory. Raducanu required a medical intervention at the end of the first set and limped through the secon …