How a loan spell at Heerenveen put Newcastle's £35m signing Sven Botman on the path to the Premier League.
Ajax moved three points clear at the top of the Eredivisie table after a 4-2 home win against Vitesse Arnhem.
PSV Eindhoven's Eredivisie title chances were dealt a blow as they had to settle for a 3-3 draw away at 10-man Vitesse.
Luuk De Jong scored his 21st league goal as PSV pulled eight points clear at the top with a 2-0 win over bottom side NAC Breda.
Robin van Persie scored a hat-trick as Feyenoord won 4-0 at home against FC Emmen in the Eredivisie on Sunday.
PSV battled back to snatch a 2-2 at Heerenveen thanks to Donyell Malen's goal in the fifth minute of stoppage time.
West Ham have rejected an offer from Dutch club Heerenveen to take Reece Oxford on loan until the end of the season.
Heerenveen denied Ajax the chance to go top of the Eredivisie as a late equaliser forced a 4-4 draw in Amsterdam.
Ajax moved to within two points of PSV Eindhoven at the top of the Eredivisie with a resounding 4-1 win at PEC Zwolle.
Former Newcastle forward Luuk De Jong channelled his inner Cristiano Ronaldo with a brilliant bicycle-kick for PSV.
PSV are still yet to drop a point in the Eredivisie after a 13th win from 13 kept them five points clear in the Eredivisie.
Third-placed Feyenoord's clash with VVV-Venlo was abandoned in the first minute following floodlight failure at De Kuip.
Third-placed Feyenoord's clash with VVV-Venlo was abandoned after less than a minute following floodlight failure at De Kuip.
Ajax took advantage of Jeremiah St Juste's early dismissal to record a 3-0 win against Feyenoord in the Eredivisie on Sunday.
PSV Eindhoven hit Emmen for six to make it nine wins from nine at the top of the Eredivisie.
PSV Eindhoven made it seven wins from seven in the Eredivisie with a 2-0 victory at NAC Breda on Saturday.
Feyenoord lost ground on the leading duo in the Eredivisie as they had to settle for a 1-1 draw at AZ Alkmaar on Sunday.
PSV Eindhoven maintained their 100 per cent start to the Eredivisie season with a 6-1 victory over Willem II at the Philips Stadion.
Fran Sol scored a hat-trick as Willem II thrashed the previously unbeaten Heracles Almelo 5-0 in the Eredivisie.
AZ Alkmaar continued to set a strong early pace in the Eredivisie after overwhelming FC Emmen 4-1 at De Oude Meerdijk.