Soccer-Costa Rica's Navas defies Dutch in goalless first half

SALVADOR, Brazil, July 5 (Reuters) - The Netherlands looked the more likely team to score but were unable to break the resistance of underdogs Costa Rica during a goalless first half of their World Cup quarter-final on Saturday. Costa Rica goalkeeper Keylor Navas pulled off a string of fine saves to keep the sides on level terms including one from Robin van Persie after 21 minutes, another from Memphis Depay and a third from a Wesley Sneijder free kick. (Reporting by Nigel Hunt, editing by Ed Osmond)