Heerenveen have got a 3-2 win over FC Twente Enschede in their last league game, which boosts their morale.
As for Ajax, they have suffered successive defeats across Eredivisie, Dutch Cup and UEL lately, with 4 losses out of their recent 5 games.
The AH line changes from -1.25 to -1.00 for the visitors, which dents the support to Ajax.
So Ajax are expected to win this home match.