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Published: 00:00, 16 August 2014 |
Updated: 21:02, 16 August 2014
Moussa, who joined the Addicks from Coventry in the summer, netted in the 90th minute to sink Wigan at The Valley.
Charlton, who were unchanged from their opening day draw at Brentford, had taken the lead with a stunning goal in the eighth minute by Jordan Cousins from 25 yards.
But Callum McNanaman cut inside Rhoys Wiggins and levelled for Wigan midway through the first half when he beat keeper Stephen Henderson. Charlton were forced into a change of keeper in the second half with Nick Pope coming on to replace Henderson on 67 minutes.
However, Moussa had the last laugh, coming off the bench and claiming a deflected winner beyond former Charlton keeper Scott Carson, who was on loan at The Valley in 2006/07.
The goal sparked ugly scenes on the touchline as Charlton boss Bob Peeters celebrated in front of visiting Wigan manager Uwe Rosler.
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