ROTTERDAM, Netherlands, Dec 15 (Reuters) - Brazilian Paulo Henrique, 18, struck twice on his debut to lead Heerenveen to a 5-1 win at NAC Breda in the Dutch league on Saturday to close the gap on the top three, who are out of action this weekend. The mayors of Amsterdam and Rotterdam have postponed the fixtures between Ajax Amsterdam and PSV Eindhoven and Feyenoord and AZ Alkmaar because they cannot guarantee public safety when the police go on strike during the games. Dutch Football Association (KNVB) director Henk Kesler said they would lodge a claim with the unions for costs already incurred by home teams Ajax and Feyenoord. Gerald Sibon opened the scoring for Heerenveen with a 24th-minute header before Miralem Sulejmani and Sibon again struck early in the second half. Teenager Henrique then grabbed his two goals to make sure of victory for the visitors. Gertjan Tamerus curled a free kick around the wall to give Breda a late consolation goal. Ajax are top with 31 points from 14 matches, one more than PSV and two ahead of Feyenoord, who are level on points with Heerenveen. NAC slipped to seventh, level on 25 points with Roda JC Kerkrade, who lost 3-2 at home to Sparta Rotterdam on Friday. Also on 25 points are Twente Enschede, who drew 1-1 with VVV Venlo on Saturday. Nordin Amrabat opened the scoring for VVV after 13 minutes but three minutes later Blaise Nkufo equalised from the penalty spot. In the final minutes Twente's Robbie Wielaert and VVV"s Karim Soltani were sent off.