After playing his farewell match in the Davis Cup, 22-time Grand Slam champion Rafael Nadal said his family kept him grounded when "things were going well". "My family...have never failed me. They've always been there for me...in the moments when things seemed impossible," the 38-year-old added. Nadal lost 4-6, 4-6 to Netherlands' Botic van de Zandschulp in the quarter-final rubber.