Warren Gatland said watching his Wales team withstand a second half Samoan onslaught was too close for comfort, but he is happy to come away from Cardiff with the win.
Wales registered their first win of the Invesco Perpetual Series 09 by edging Samoa 17-13 in front of 58,907 fans on Family Night.
And the huge crowd went home happy, but had to endure a nervy final 20 minutes after Wales failed to turn their dominance into points.
Coach Gatland explained afterwards, "We wanted to be more ruthless in our approach, but unfortunately we weren't. We created a lot of chances and line breaks and e should have put the game away.
"But we simply weren't clinical enough. We have to learn from our mistakes and in the first-half we kept kicking the ball away.
"We felt physically that if we kept playing with tempo their forwards would struggle and tire later on.
And the Kiwi coach would have been as nervous as anyone as Samoa pulled to within a converted try over a monumental win after Mapusua scored an interception try on the hour mark.
Gatland said; "It was a little bit too close for comfort in the end and we put ourselves under pressure. We made 11 line breaks to their two and our finishing wasn't good enough.
"We should have put the game away comfortably. The game should have been out of sight by the time they got their interception try - that was a 14 point try because if he hadn't have caught it we would probably have scored.
"But we have come away with a win."
Captain, and Man of the Match Ryan Jones commented: "It was about as tough as it gets in Test match rugby. The Samoans gave everything and really hit hard.
"But our boys dug deep for the victory that we wanted and needed. There is a courage, strong work rate and work ethic with my guys and it was great we kept them out in the last five or six minutes.
"We need to look at cutting out the mistakes. We have been offering so much, but not quite delivering - we haven't had that clinical edge in our game.
"It has been a case of the last pass or the last phase letting us down.
"But fair play to the Samoans, they came together on Sunday and put a fantastic performance together.
"The game against Argentina is going to be very difficult and we have got to take more ownership of the game and cut down on the errors.
After two years in the international wilderness, Adi Taviner is hoping to make up for lost time when she takes part in her second Women's Rugby World Cup which kicks off in Paris next Friday where Wales take on hosts, France.
The WRU's Women and Girls legacy events - #TRY OUR GAME have proved popular this week with current players and newcomers to the game learning new skills and picking up tips from national squad players.
We caught up with Shona and Ellie from the Wales women team ahead of the start of the Women's Rugby World Cup in Paris next month at a recent women's training session to encourage and promote more women and girls to try their hand at rugby. #tryourgame
The Women's Rugby World Cup warm-up clash between Wales and USA proved bittersweet for centre Elen Evans. Despite being one of the star performers on the day on her 50th Test appearance, USA edged home 10-7 at Cross Keys.
Wales completed their Junior World Championship campaign with a victory over Samoa. Team manager Mark Taylor and No 8 James Benjamin reflect on a tournament which saw Wales win three games and lose two.