Kenneth Perez scored two goals and set up two more for Klaas-Jan Huntelaar on Sunday to lift Ajax over nine-man Feyenoord 4-0 in the Dutch league.
Huntelaar first headed in Perez's 12th-minute corner, then scored again in the 38th off another assist from Perez.
Perez converted from the penalty spot in the 50th after Dwight Tiendalli brought down Huntelaar in the area. The Denmark winger then put back a rebound in the 62nd.
Four minutes after the fourth goal, Feyenoord substitute Pierre van Hooijdonk was red-carded for a harsh foul on Urby Emanuelson. Sebastian Pardo was also ejected for a second booking as referee Rene Temmink issued eight yellow cards in a stormy second-half.
Defending champion PSV Eindhoven moved into second place after beating AZ Alkmaar 3-1. It was AZ's first loss of the season.
Manuel da Costa scored in his Dutch league debut for PSV, heading in a cross from Philip Cocu in the 12th minute. Edison Mendez and Arouna Kone added goals in first-half injury time for PSV.
Kone scored his first league goal of the season with a 30-yard drive a minute after Jefferson Farfan fed Mendez for PSV's second.
Demy de Zeeuw scored a 71st-minute goal for AZ, which hasn't won at home against PSV in eight years.
The win put PSV ahead of AZ and into second place with 19 points, two behind Ajax. AZ and FC Twente both have 17 points. Feyenoord is ninth with 11 points.
Also, Youssef El Akchaoui scored an injury-time penalty to give NEC Nijmegen a 1-0 win over Vitesse Arnhem, and FC Utrecht beat ADO The Hague 2-0.
ADO, looking for its first win at Utrecht in 30 years, fell behind when Rick Kruys scored a 24th-minute goal. Cederic van der Gun gave Utrecht a 2-0 lead in the 37th.
Afonso Alves scored three goals and Rob Friend added another in SC Heerenveen's 4-2 victory over FC Groningen. Yevgeny Levchenko scored two goals in the last 10 minutes for Groningen.
On Saturday, it was: Roda JC 2, Sparta Rotterdam 1; RKC Waalwijk 0, NAC Breda 1; and FC Twente 4, Excelsior Rotterdam 1. Willem II beat 10-man Heracles Almelo 2-0 Friday.
© The Canadian Press, 2007