Although Walker described the players as "absolutely gutted" to miss out on a place in the World Cup final, he said they could take great encouragement from the emotional scenes at the end of Wednesday night's defeat against Croatia, when England fans showed their respect for the team's performances in Russian Federation by staying behind to applaud the players and singing their names.
Croatia will be coming off its third straight extra-time match and is the first team in 28 years to come from behind to win a World Cup semifinal.
Click through the mini-gallery above to see pictures of Croatia's celebrations after they qualified for the World Cup final! "I don´t think realistically any of us did", he said. Until then, goodnight and goodbye!
"We are in the final, it's the biggest success in Croatian history in sport, and we have to be proud".
Raheem Sterling was a key player for England in Russian Federation despite his lack of goals. Is this the victor?! In extra-time nobody wanted to be substituted. Hopefully the shoot-out is good at least.
He added: "Let me tell you, whether we win or lose the game, my life will not change", he said. Extra time it is. His stepovers, pace, precise passes, shooting and most of all, his enormous hunger kept him going and going until the breakthrough was made. That came from out of nowhere!
ENGLAND face Belgium in the World Cup third-place play-off on Saturday, but who will start? England are happy so sit back and defend.
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They lost a semi-final to eventual winners Spain in 2010, but bounced back to become world champions in Brazil four years later. Can Croatia make a comeback in the 2nd half? That will undoubtedly please England fans.
Kane had a chance to double the lead in the 30th minute when Subasic made a sliding save on his short-range shot and Kane's follow-up effort from the end line hit the post and bounced off the keeper and up as the flag went up. My word, that is too easy a chance to miss.
Croatia's dream continues into Sunday's final against France. What a way to open his goalscoring account for England.
While going to 30 minutes of extra time in all three of their sudden death matches - not to mention emotional energy-sapping penalty shootouts in two - has proved beyond doubt Croatia's resilience, it has taken its toll. Croatia's trio in the middle is a solid one.
From the moment Kieran Trippier put England ahead to Croatia's equaliser, Mario Mandzukic's victor and then the full-time whistle.
The country of around 4 million people came to a standstill as Croatians watched the game on screens in squares and cafes.
In their quarter-final clash with Russia, the Croats showed a different side, being willing to slug it out with the Russians for 120 minutes before keeping their cool and winning the shootout in such a partisan atmosphere.