|RBS Six Nations: Scotland v Wales|
|Venue: Murrayfield, Edinburgh Date: Sunday, 15 February Kick-off: 15:00 GMTCoverage: Live on BBC TV, HD, Red Button, Radio 5 live, BBC Radio Wales, Radio Cymru, the BBC Sport website, BBC iPlayer, S4C online, mobile, the BBC Sport app and Connected TV; text commentary on the BBC Sport website.|
Jake Ball said Wales let themselves down in the second half of their 21-16 defeat by England.
Warren Gatland's team led 16-8 at half-time of the opening Six Nations championship match in Cardiff.
But England scored 13 unanswered points to record a second successive win over Wales and banish memories of their 30-3 defeat in 2013.
"We had a game there that should have been won and we let it go in the second half," said Scarlets lock Ball.
"It was a tale of two halves. We started the way we'd spoken about and then let ourselves down.
"People say that we're renowned for starting slowly but we started quick and maybe just took the foot off the pedal a bit."
Wales led 10-0 within the opening nine minutes thanks to Rhys Webb's try and a conversion and penalty by Leigh Halfpenny.
England fought back through a George Ford penalty and an Anthony Watson try before Dan Biggar's drop-goal gave Wales an eight point cushion at the break.
But the visitors dominated the second half, with Jonathan Joseph's converted try and two late Ford penalties giving them a deserved win.
|Wales in the 2015 Six Nations|
|Friday, 6 February: Wales 16-21 England|
|Sunday, 15 February: Scotland (Murrayfield)|
|Saturday, 28 February: France (Paris)|
|Saturday, 14 March: Ireland (Cardiff)|
|Saturday, 21 March: Italy (Rome)|
The overall tally in 125 matches between the teams is now Wales 56-58 England with 12 draws.
"They basically starved us of the ball," added Ball.
"And at the breakdown we could couldn't get the quick ball we wanted - and you can't play the game without the ball."
Wales face Scotland at Murrayfield in their next match, with Ball saying the team will learn the lessons from the defeat against England.
"There were a lot of positives we can take from the first half. It's a case of keeping that intensity for 80 minutes," he added.
"We'll go away, work hard and come back a better and stronger team next week."