Martin Petrov converted the penalty to equalise .
Then N'Gog himself scored in the 74th minute to give Bolton a 2 -- 1 lead before being sent off in stoppage time for a second bookable offence .
Martin Petrov converted the penalty to equalise and then N'Gog himself scored in the 74th minute to give Bolton a 2 -- 1 lead before being sent off in stoppage time for a second bookable offence .