The 32-year-old striker made his debut in the competition against Uruguay but moments later saw his country eliminated, claiming the moment was the worst in his career
England fell short of expectations by failing to qualify to the knockout rounds after succumbing to defeats from Italy and Uruguay, and now take on table-toppers Costa Rica in their final game.
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"It's been the best experience of my career and probably the worst experience at the same time," he told the FA’s official website while at England’s team hotel in Rio de Janeiro.
"It's always difficult being an England fan and getting knocked out, but this time being involved is devastating to get knocked out at an early stage.
"It was probably the worst moment of my career when the final whistle went and we were knocked out of the World Cup. It was horrible.
"Maybe I might look back in years to come and think 'I've played in a World Cup', that will live with me forever. But I can't remember any moments that are as bad as that."
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"One thing is very important - we don't make any knee-jerk decisions," he said. "I think the set-up we have, the manager who is in charge is definitely the person we need to go forward with the group of young kids coming through.
"The progression they have had under Roy has been amazing, so if he can keep the group together for another two years it's going to be exiting and they are going to learn after what has just happened.
"Roy has given the young players a chance and they have thrived on it. That's definitely one of the positives we'll take out of the World Cup and when the next scenario comes around in the next two years at the Euros, this is going to help them. That's why this set-up needs to stay together."