AZ Alkmaar moved into the last 16 of the Europa League with Maarten Martens' deflected effort securing a second 1-0 win over Anderlecht.
The Eredivisie side matched last week's home win on their trip to the Constant Vanden Stock Stadium despite a shaky start to the match that saw Matias Suarez hit the post with a superb volley from long range.
Martens brought about the only goal of the game in the 54th minute when his neat volleyed effort went in via Anderlecht's Marcin Wasilewski
Just 30 seconds were on the clock when Anderlecht created the first chance from a corner, Wasilewski heading over from Lucas Biglia's delivery.
Suarez's sumptuous volley followed with just five minutes gone.
The Argentinian striker was fully 30 yards from goal when he raced on to a looping ball and drilled towards goal first time, leaving Esteban Alvarado beaten but crashing off the inside of the post.
AZ, with the lead in the bank from the previous match, were creating little of their own and absorbed another chance when Guillaume Gillet missed the target in the 13th minute.
When the Dutch side finally mustered something positive of their own, Brett Holman deposited Roy Beerens' cross over the bar.
The sides settled into a period of stalemate until five minutes before the break when Sacha Kljestan beat the wall with a free-kick that needed an athletic save from Alvarado, who tipped over the top.
AZ's Adam Maher had a wonderful chance moments into the second half, beating the offside trap and bearing down on Silvio Proto but dragging his shot wide of the far post.
Both teams seemed more open as the second period continued, Milan Jovanovic missing a headed chance and Beerens working Proto at the other end soon after.
With 54 minutes gone, AZ were ahead.
Beerens provided a glorious cross from a deep position on the right, Martens showed impressive technique to meet the ball with a side-footed volley and a heavy deflection off Wasilewski took the ball across the goalkeeper and into the far corner.
That away goal made Gertjan Verbeek's side heavy favourites and Anderlecht were unable to change that despite Dieudonne Mbokani hitting the crossbar with an effort off his back in the final seconds.