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.
Wales Under 18 captain Callum Bradbury is delighted to have seen his side claim a narrow 18-17 victory against a strong SA Schools 'A' side to end the three-match Under 19 International Series in South Africa on a high note.
The Wales U18 squad spent an emotional day in the drug-riddled townnship of Hout Bay. Hout Bay Warriors President Fred Johannes said the visit was 'the talk of the town' and will dream about the day everyday for the rest of his life.
RGC 1404's new head coach Mark Jones is hoping to build 'something special' in north Wales and is already looking forward to the development region participating in the Principality Premiership for the very first time.
A joint venture between the WRU and Admiral saw hundreds of children enjoy the Admiral Festival of Rugby held at the National Centre of Excellence at the weekend where Welsh internationals Sam Warburton, Scott Williams and Rob Evans were in attendance.
Wll Jones leads Wales U18s into battle this afternoon against Italy where the Welsh side will be seeking to bounce back from their narrow defeat to SA Schools in their opening clash of the U19 International Series
All four regions attended a successful training camp staged last weekend at the WRU National Centre of Excellence. It was a chance for new Wales Women's head coach Rowland Phillips to deliver his key messages to players and coaches as he prepares for the new season.
Wales U18 Team Manager Gethin Watts believes the next couple of weeks will be 'extremely beneficial' to the future of Welsh rugby as his side prepare to take part in the Under 19 International Series being staged in South Africa.
The WRU is searching for 12 new rugby development apprentices following a successful first year of its WRU Coach Core programme. Craig Duncan and Jess Hancock have flourished in the first year of the programme which has given them a real direction in their lives.
The WRU signed TV comedian Rhod Gilbert up to a 'Coaching Children Level 1' course before letting him loose on an U8s side at Whitland Junior Borderers - we went behind the scenes to film the making of 'Rhod Gilbert's Work Experience' see the results here.
Llandovery are aiming to make it three titles in a row in this year's Foster's National 7s being held at BT Sport Cardiff Arms Park on Sunday 28 August. Drovers assistant coach Simon Davies and Lee Rees assess their sides chances
A pioneering strength and conditioning programme has been delivered to more than 8000 boys and girls at hub schools throughout Wales this season, helping to develop stronger, more flexible athletes for rugby and other sports.
The Singha Premiership Rugby 7s Series returns to the BT Sport Cardiff Arms Park on July 22nd when all four Welsh regions go head to head. Scarlets skills coach Dai Flanagan and Blues Elite Performance Pathway Manager Richard Hodges along with current Welsh squad members were at the launch of this season's event