Ben Amos was unable to stop Charlton Athletic's Sky Bet League One winless run extending to three matches as the Addicks lost at home to Portsmouth on Saturday.
Josh Magennis's own goal shortly after the restart was the difference on the day as Charlton fell to a 1-0 defeat against their fellow play-off hopefuls.
Amos and Charlton are next in action on Saturday when they travel to in-form Blackburn Rovers.