Marin Cilic defeated David Nalbandian in a 5-hour marathon to give Croatia a 1-0 lead over Argentina Friday in their Davis Cup quarterfinal.

Cilic won the error-filled match 5-7, 6-4, 4-6, 7-6 (2), 6-3. That puts pressure on Argentina's Juan Martin del Potro, who will face Ivo Karlovic in the second singles Friday. Doubles are set for Saturday with reverse singles on Sunday.