Two Johnnie Jackson penalties helped top-of-the-table Charlton beat MK Dons.
The hosts took the lead from Jackson's first spot-kick, after Gary MacKenzie saw red for an off-the-ball incident involving Yann Kermorgant in the area.
The Addicks were then gifted another when Alan Smith brought down Jackson in the box, and the midfielder stepped up to score his second.
Dean Bowditch then gave the Dons hope when he slotted home from a tight angle but Charlton held on for three points.
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MK Dons manager Karl Robinson told BBC Three Counties Radio:
"It was a performance of men. A performance of good footballers. There was grit and people who care for the club.
"I don't think you could ask for much more.
"I thought we created a number of chances with 11 men and with 10.
"It just shows you we're a really good team in this league. We came to the top team and proved we can mix it with the big boys."