NPR's Scott Detrow speaks with sports journalist Reem Abulleil, Rafael Nadal's impact on men's tennis and what the sport could look like as top players retire.
Netherlands claimed a hard-fought 1-0 lead over Germany in the Davis Cup semi-finals on Friday as Botic van de Zandschulp beat Daniel Altmaier 6-4, 6-7 (12/14), 6-3 in the first singles rubber.