Sven Goran Eriksson offered his support to Conrad Logan after the Leicester City goalkeeper's mistake against West Bromwich Albion.
Leicester crashed out of the Carling Cup after a 4-1 home defeat by West Brom on Tuesday night, but Logan's error was a key moment in the match.
Logan dropped Gianni Zuiverloon's long ball straight at the feet of Somen Tchoyi, who took advantage to put the Baggies 2-1 ahead at the Walkers Stadium.
But former England coach Eriksson insisted mistakes like these happen in football and rightly pointed to the impressive saves Logan made during the 90 minutes.
"Of course it's a mistake, everyone knows that and he knows that," said Eriksson. "That happens in football, but the third or fourth goals were worse.
"You know goalkeepers sometimes make mistakes, it was unlucky."
Asked whether Logan was apologetic afterwards, Eriksson added: "Of course. You can imagine how you feel when it's an important game, it's 1-1 when we are in the game and we have a good chance to win it.
"It happens in football, but he will not sleep very well tonight."
Simon Cox, who scored the winner that saw off Manchester City in the last round, had opened the scoring midway through the first half with a dinked finish over Logan but an own goal from substitute Nicky Shorey levelled things up after the break.
Steven Reid, Baggies captain for the night, found himself unmarked to head a third and put the game beyond the Foxes before Cox grabbed his second in style with a long-range strike in the last minute.
Eriksson said: "I think we were as good on the pitch as West Brom and that's good, we played rather good football, created opportunities, so it's a pity that we're out of the Carling Cup.
"It's even more of a pity for people who haven't seen this game who will think West Brom have cruised over us, that was not the case.
"But saying that, it doesn't really matter how good football we play if we don't stop conceding goals that easy.
"It's absolutely too easy to score goals against us. If we don't change that then we can forget about the play-offs or promotion."