Kiwi darts players Warren Parry, teamed with Rob Szabo, lost to Northern Ireland in the second round of the darts World Cup in Germany.

New Zealand darts pair Warren Parry and Rob Szabo have been unable to repeat their first round upset, tumbling out of the World Cup at the hands of Northern Ireland on Saturday (Sunday NZT).

Parry and Szabo on Friday (Saturday NZT) beat three-time world champion John Part and his Canadian team-mate Ken MacNeil to advance to the second round for the first time in New Zealand's four World Cup appearances.

However, Northern Ireland, semifinalists a year ago, were too strong in the last 16 matchup, winning 2-0 on the back of two singles victories in Frankfurt, Germany.

Brendan Dolan came from a leg down to beat Szabo 4-1 before Mickey Mansell whitewashed Parry 4-0.

"I had a scare against New Zealand on my debut in the world championship a few years ago when Preston Ridd beat me 4-0, so I had a worry about New Zealand players," Mansell said.

"They won in the first round and showed that they're able to beat anybody, and I was trying extra hard so I was happy with how I played."