Two goals from Mbo Mpenza and a header from Hannu Tihinen earned Anderlecht their first victory in three outings.
Champions Club Bruges moved to within a point of the leaders with a 2-0 win over Germinal Beerschot.
Croatia midfielder Bosko Balaban scored both goals for
Arsenal top group thanks to late comeback in Belgium
Bruges, who have played one more game than the top two and have 31 points.
Bosnian striker Adnan Custovic scored a hat-trick for Excelsior Mouscron in their 6-3 win at St Truiden.
Martinelli stars as Arsenal thrash Standard Liege
Onyewu in Toon medical
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