Ajax signed former Germany international Heiko Westermann from Real Betis to a two-year deal on Saturday.
AZ Alkmaar striker Vincent Janssen says he is close to joining Tottenham, claiming negotiations between the clubs could be concluded soon.
Former Liverpool player Jones had previously played in the Eredivisie during a six-month spell with NEC Nijmegen.
AZ Alkmaar sporting director Max Huiberts says they have "heard nothing" from Tottenham since rejecting the club's opening bid for Vincent Janssen.
Feyenoord goalkeeper Kenneth Vermeer has ruptured his Achilles tendon and will be sidelined for the rest of the year.
Tottenham Hotspur are expected to complete the signing of AZ Alkmaar striker Vincent Janssen this week, sources have told ESPN FC.