Alex de Minaur admits he needs to take his tennis to even higher levels to challenge Jannik Sinner after suffering a ninth straight loss to Italy's world No.1.
Thanasi Kokkinakis has vindicated his captain's faith to lead Australia into a Davis Cup semi-final showdown with Jannik Sinner's defending champions Italy.
Australia's hopes of ending a 50-year Billie Jean King Cup title drought have ended with a 2-0 quarter-final loss to inspired underdogs Slovakia in Spain.
