Damien Duff twisted the knife into former club Newcastle after their striker misery deepened in a 1-0 Premier League defeat at Fulham.
Duff netted his first league goal for almost a year to settle a tight affair and propel the in-form Cottagers to 12th in the table, one point behind their opponents.
It was another night to forget for Newcastle, who lost Shola Ameobi to a suspected fractured cheekbone just 13 minutes in, less than 48 hours after selling star striker Andy Carroll to Liverpool.
Newcastle could ill afford to lose another forward but that was exactly what happened when Ameobi took an elbow to the head in a challenge with Steve Sidwell after just 10 minutes.
Duff's deflected shot and a weak Danny Simpson strike at the other end were the only efforts of note in the opening quarter, although Sidwell arguably saved a goal by flicking Joey Barton's free-kick behind.
Suicidal defending ultimately cost Newcastle in the 67th minute when Jose Enrique was too easily beaten by Duff to Murphy's 60-yard ball and the Irishman kept his cool to strike right-footed past Harper.