ROTTERDAM, Netherlands, Feb 24 (Reuters) - PSV Eindhoven defender Alex headed the winner five minutes from time as the Dutch league leaders beat visitors Groningen 1-0 on Saturday.
The result leaves PSV top with 63 points and eight matches remaining, eight points more than Ajax Amsterdam who visit AZ Alkmaar, who are third with 54 points, on Sunday.
Fourth-placed Twente Enschede, held to a goalless draw by lowly Willem II Tilburg, are level on points with Alkmaar.
Feyenoord, fifth with 45 points, travel to bottom side ADO Den Haag on Sunday.
Roda JC Kerkrade booked a 1-0 home win against Heerenveen after Andres Oper struck two minutes before the interval.
They have leapfrogged the visitors, moving up two places on 40 points while Heerenveen slipped two to eighth with 38 points.
In the other action on Saturday, Sparta Rotterdam and Heracles Almelo shared the points in a goalless draw.