PSV Eindhoven ended the weekend top of the Eredivisie after beating Utrecht 2-0 on Sunday.
Celtic have completed the signings of Patrick Roberts and Colin Kazim-Richards on Transfer Deadline Day.
Ajax blew the chance to go back to the top of the Eredivisie after conceding a stoppage-time equaliser against Roda.
Feyenoord lost more ground on the Eredivisie leaders after being beaten 2-1 at home by Heerenveen - their fourth straight defeat.
Feyenoord's Anass Achahbar produces a moment of sheer brilliance to haul his side level against Heerenveen.
PSV closed the gap to Ajax at the top with a 4-2 win over Twente, while AZ Alkmaar beat Feyenoord on Sunday in Eredivisie.
Feyenoord have suspended striker Colin Kazim-Richards for threatening a journalist.
Amin Younes gave Eredivisie leaders Ajax a 1-0 win at ADO Den Haag, while PSV won 2-0 at Feyenoord on Sunday.
As Bundesliga, Serie A, Ligue 1 and Eredivisie head for their winter breaks, while La Liga returns, we look at the state of play in Europe.
Ajax will take a three-point lead into the winter break after Riechedly Bazoer secured a 2-1 victory against De Graafschap.
Eredivisie leaders Ajax slipped to a 1-0 defeat at Utrecht on Sunday, while Feyenoord were held to a 1-1 draw at Groningen.
Dirk Kuyt's impressive scoring form continued for Feyenoord on Sunday as the Rotterdam club beat Heracles Almelo 3-0 at home.
Michiel Kramer scored a hat-trick as Feyenoord won the Rotterdam derby 4-2 at Excelsior to move level with leaders Ajax,
Feyenoord moved up to second in the Eredivisie with a 5-1 thrashing of FC Twente at De Kuip.
Which team has recorded the best win percentage in the history of six of Europe's leading leagues? Find out here...
Ajax maintained their three-point advantage over Feyenoord with a 1-1 away draw on Sunday, as PSV Eindhoven jumped into second spot.
Feyenoord lost ground in the Eredivisie title race after a shock 1-0 loss against ADO Den Haag.
Feyenoord's Sven van Beek scored perhaps the funniest own goal of the weekend in their 1-0 defeat to Den Haag.
Ajax and Feyenoord both recorded 3-1 victories on Sunday to remain locked together at the top of the Eredivisie.
Feyenoord's Dirk Kuyt his second hat-trick in two games as they beat AZ Alkmaar 3-1 in the Eredivisie.