AMSTERDAM, Feb 3 (Reuters) - AZ Alkmaar opened up the Dutch title race as striker Danny Koevermans scored a late goal to seal a stunning 3-2 win at leaders PSV Eindhoven on Saturday.
PSV, who suffered their first home defeat since December 2004, remain top with 56 points from 23 matches but are now only six points ahead of second-placed Alkmaar.
PSV, who have now lost two successive games, went ahead when Phillip Cocu set up Peru striker Jefferson Farfan with a brilliant backheel after 19 minutes. However, just after the break Moussa Dembele equalised for Alkmaar with a fierce shot.
Just past the hour mark Julian Jenner put the visitors in front direct from a corner which went in off the post after Cocu failed to clear, although the PSV captain made up for his error three minutes later when he levelled the scores at 2-2.
Koevermans clinched three valubable points for title hopefuls Alkmaar as he struck from close range after a corner.
Ajax Amsterdam, who are third in the stadnings with 48 points, host arch-rivals Feyenoord on Sunday.
Excelsior Rotterdam lost 2-1 at home to fourth-placed Twente Enschede, who are now just a point behind Ajax, as they suffered their ninth consecutive defeat.
Twente's Karim El Ahmadi opened the scoring after 33 minutes from close range after some sloppy defending but Excelsior equalised a minute later when Johan Voskamp netted a rebound.
On the stroke of halftime Ramon Zomer's header set up Blaise N'Kufo to restore Twente's lead and they held on for the win.
NAC Breda climbed one place to seventh on 35 points after a 2-1 derby win over visiting bottom side RKC Waalwijk. RKC, who have just 13 points, finished the game with 10 men after Hans Mulder was sent off two minutes from time.
Glen Salmon scored a goal in each half for NAC to clinch the points either side of Ruud Berger's equaliser on the half-hour.