Napier City player/coach Bill Robertson, who came into the game as a second-half substitute, was delighted with the application and professionalism his team showed as Birkenhead chased a spot in their first ASB Chatham Cup final.
"We're obviously delighted to get over the line," Robertson said.
"It's a goal we set ourselves right at the start of the season to try and win the Central League and the Chatham Cup, and we're 90 minutes away from doing that.
"I'm pleased with the work rate. It was a tough game and a physical game. Birkenhead are a big physical side and have put us under pressure for long periods but we've dealt with it.
"[We showed] a lot of composure there. We've spoken about that in big games this year. It couldn't be any bigger than a semifinal of the Chatham Cup and the lads have delivered again to the high standards we needed to get through."
Birkenhead coach Paul Hobson was philosophical.
"It was a typical semifinal and I've got no qualms about the result," he said. "It was an even match and it could have gone either way and Napier got it."
Napier City 1
Birkenhead Utd 1
(Napier City Rovers win 4-3 in penalty shootout)