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Nicky Bailey's goal 13 minutes from time earned Charlton their first League 1 win in four matches at Wycombe on Saturday.
The Addicks captain lashed the ball home after his initial effort had been blocked to secure a 2-1 victory and cut Leeds' lead at the top of the table to six points.
It was a huge bonus for the Addicks who had seen Jonjo Shelvey's early goal cancelled out by Jon-Paul Pittman midway through the second half.
Wycombe, who got a point at Leeds in their last outing, should have led as early as the third minute when Stuart Beavon raced clear after a slip by Christian Dailly, but he somehow contrived to shoot wide.
The opening goal came on 11 minutes when Shelvey - restored to the starting line-up - finished well after being superbly found by Lloyd Sam.
Pitman, who got the hosts' goal at the leaders last week, equalised in the 64th minute after some neat footwork - but it was Charlton's inspirational skipper who would have the final say.
Charlton: Elliot, Llera, Semedo, Basey, Omozusi (Richardson 68), Dailly, Bailey, Shelvey, Sam, Burton (McKenzie 74), Mooney (Dickson 66). Subs not used: Randolph, Wagstaff, Racon, Spring.
Attendance: 6,123.