AMSTERDAM, December 13 (Eredivisie) - Two crunch clashes at the top of the Eredivisie on Sunday could be cancelled because of police action.
Leaders Ajax are preparing to welcome PSV Eindhoven, who sit just a point behind them in the table, while third-placed Feyenoord host AZ Alkmaar.
But if the proposed protests by the Dutch police go ahead the games will be cancelled because public security cannot be guaranteed.
The police unions ACP and ANPV announced on Thursday that they will hold union meetings during the time that the matches are played, which would lead to a shortage of staff.
They are protesting after failing in their negotiations for an improved collective labour agreement with the minister of interior affairs Guusje ter Horst.
ACP are demanding a pay rise of 200 euros a month after tax for every police officer, a figure Ter Horst is against.
Should the games go ahead, Ajax coach Adrie Koster believes his side will approach their clash with PSV full of confidence following the 3-2 win over Willem II last weekend.
Ajax went into that game on the back of their first league defeat to NAC Breda, but produced a good performance in Tilburg to get themselves back on track.
'Following our loss to NAC, the win in Tilburg was very important,' Koster told the club`s official website www.ajax.nl.
'It meant we could prepare for the match against PSV in confident mood. If we had lost, it would have been different.'
On Friday fifth-placed Roda JC, fresh from their win over PSV last Friday, take on second-from bottom Sparta Rotterdam who earnt their first league victory this season over NEC Nijmegen last weekend.
Saturday sees fourth-placed Heerenveen take on sixth-placed NAC Breda in what is set to be an exciting clash at the Abe Lenstra Stadion.
Elsewhere on Saturday, FC Twente entertain VVV Venlo and NEC Nijmegen visit De Graafschap.
Bottom-side Excelsior will be looking for their first away win of the season against Vitesse Arnhem on Sunday, while FC Groningen take on Willem II and FC Utrecht face Heracles Almelo.