Cricket: Disappointed Ireland Trent captain Johnston believes there is still more to come from his side as they attempt to complete another upset similar to their victory over Pakistan in the group stages.
"I'm proud and disappointed at the same time," he said following yesterday's 48 run Super Eight defeat to England.
"The way we performed for 40 overs was outstanding on that wicket against the quality batsmen we were bowling to, but unfortunately we let it slip.
"I'm very proud, but if we'd have played the way we did against Pakistan and Canada then we may have got closer.
"It's another learning curve for us, but we've got another five games and hopefully we can improve and if we do that then I'll be very happy."
England captain Michael Vaughan said his team needed to find a more ruthless streak after struggling for large parts of the game.
"Very rarely do you play a 100 percent game and at the minute we're playing at about 80 percent," Vaughan said. "I'd like to see us playing a bit more than that."
England were 113-4 at one stage against Ireland before Paul Collingwood helped them reach 266-7.
Then with the ball, England lacked penetration as some of the Irish batsmen occupied the crease for long periods.
Although Vaughan knows his side have more improvements to make, he was relieved to get points on the board. They lost to New Zealand in Group C so took no points through to the next stage.
"We just needed to win the match and take the two points," he said. "There are obviously areas where we need to improve but there are also areas where we were very good as well.
"It would have been nice to nail home the Irish when we had them six down and when we had got the rate to 11 an over, but that wasn't to be and they played well and we just didn't quite get it right for a few overs.
"In the last five overs we showed that we can get it right. We need to try and bowl teams out when we get an opportunity, when they're five or six down, as we haven't done that yet."
Vaughan, who described the Ireland game as a potential "banana skin" said if he had the chance again he would have bowled first, after the cracks in the pitch that concerned him failed to have any impact on the match.