The new strike pair caused the Sunderland defence no end of problems as Wigan followed up their midweek home victory over Middlesbrough with another convincing performance.
Heskey gave the home side a 19th-minute lead with a predatory strike, before two penalties in nine minutes midway through the second half by Denny Landzaat and then Sibierski sealed Wigan´s second win in four days.
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