The Dutch goalkeeper fumbled a long-range effort from Roma's Japanese midfielder Hidetoshi Nakata, enabling the latter to score a fortunate goal.
He guided the team for four consecutive years, winning a UEFA Intertoto Cup, showing valid coaching abilities and launching several players, including 2006 FIFA World Cup winner Marco Materazzi (who reached a career high of 12 goals in a single season under Cosmi's tenure), then-unknown Japanese Hidetoshi Nakata, Fabrizio Miccoli, Fabio Grosso and Fabio Liverani.