The Swedish national team goalkeeper, who left Djurgården for Derby during the past Allsvenskan season, made a major blunder in the heavy defeat in Sheffield.
After a Derby attack, the ball ended up with the home team's Josh Windass. He shot directly – from about 60 meters. And the ball flew in a perfect arc over a misplaced Widell Zetterström, a goal that meant 2–0 for Sheffield Wednesday.
There would be more from both teams and Derby ultimately fell 2–4.
After the defeat, Derby finds themselves in 17th place in The Championship's table, with only five points above the relegation line.
Sheffield Wednesday, meanwhile, climb to ninth place and have a qualifying spot for the Premier League within reach.