Heerenveen director Yme Kuiper insists the club will not let midfielder Michael Bradley leave on the cheap.
Bradley will return to the club on Friday after playing for the United States at the Olympics in Beijing.
The 21-year-old is looking for a transfer and has refused to sign an extension to his current contract, which expires in June 2009.
"Bradley is allowed to leave us, but only for a realistic transfer fee," Kuiper told the club's official website.
"If that does not come along, it is better that he stays with us. Bradley is a good football player who can certainly be of value to us."
Middlesbrough, Blackburn and Everton have all be strongly linked with the American throughout the summer, while a number of German clubs, including Hamburg, are also said to be interested.

Latest Sky Sports News Report
League One Round Up - 21st November
Tottenham v Wigan - 2nd Half
Championship Round Up - 21st November
League Two Round Up - 21st November
Tottenham v Wigan - 1st Half
Stoke 1-0 Portsmouth - Fuller and Sorensen
Tottenham 9-1 Wigan - Defoe
| Time | Fixture |
|---|---|
| Friday 27th November | |
| Dutch Eredivisie | |
| 19:45 | Sparta vs PSV |
| Saturday 28th November | |
| Dutch Eredivisie | |
| 17:45 | AZ vs VVV |
| 18:45 | Heerenveen vs RKC |
| 18:45 | Heracles vs Roda JC |
| 19:45 | Willem II vs FC Twente |
| Sunday 29th November | |
| Dutch Eredivisie | |
| 11:30 | ADO Den Haag vs Feyenoord |
| 11:30 | Vitesse vs Ajax |
| 13:30 | FC Groningen vs NEC |
| 13:30 | FC Utrecht vs NAC |
| Friday 4th December | |
| Dutch Eredivisie | |
| 19:45 | AZ vs Vitesse |
| 19:45 | NAC vs Sparta |
| 19:45 | Roda JC vs ADO Den Haag |
| 19:45 | VVV vs Willem II |
| Sunday 6th December | |
| Dutch Eredivisie | |
| 11:30 | FC Utrecht vs Ajax |
| 13:30 | Feyenoord vs FC Groningen |
| 13:30 | RKC vs PSV |
| 15:30 | Heracles vs Heerenveen |
| 15:30 | NEC vs FC Twente |
| Friday 11th December | |
| Dutch Eredivisie | |
| 19:45 | Ajax vs NEC |
| Saturday 12th December | |
| Dutch Eredivisie | |
| 17:45 | VVV vs RKC |
| Time | Result |
|---|---|
| Sunday 22nd November | |
| Dutch Eredivisie | |
| Feyenoord 0 - 0 FC Utrecht | |
| VVV 5 - 0 Sparta | |
| Willem II 1 - 1 ADO Den Haag | |
| Ajax 5 - 1 Heerenveen | |
| PSV 4 - 0 Heracles | |
| Saturday 21st November | |
| Dutch Eredivisie | |
| Roda JC 2 - 4 AZ | |
| RKC 3 - 1 FC Groningen | |
| NAC 3 - 3 NEC | |
| FC Twente 1 - 0 Vitesse | |
| Sunday 8th November | |
| Dutch Eredivisie | |
| NAC 4 - 0 Willem II | |
| FC Utrecht 2 - 3 Heerenveen | |
| ADO Den Haag 1 - 5 PSV | |
| AZ 1 - 1 Feyenoord | |
| FC Twente 1 - 0 Ajax | |
| Saturday 7th November | |
| Dutch Eredivisie | |
| Vitesse 2 - 0 VVV | |
| Sparta 1 - 2 Roda JC | |
| NEC 0 - 1 RKC | |
| Friday 6th November | |
| Dutch Eredivisie | |
| FC Groningen 4 - 1 Heracles | |
| Sunday 1st November | |
| Dutch Eredivisie | |
| Ajax 5 - 1 Feyenoord | |
| RKC 0 - 1 Willem II | |
| Pos | Team | P | Pts |
|---|---|---|---|
| 1 | FC Twente | 14 | 38 |
| 2 | PSV Eindhoven | 14 | 36 |
| 3 | Ajax | 14 | 32 |
| 4 | Feyenoord | 14 | 25 |
| 5 | FC Utrecht | 14 | 23 |
| 6 | AZ Alkmaar | 14 | 22 |
| 7 | NAC Breda | 14 | 21 |
| 8 | Heracles Almelo | 14 | 20 |
| 9 | Sparta Rotterdam | 14 | 17 |
| 10 | VVV | 14 | 14 |
| 11 | Vitesse Arnhem | 14 | 14 |
| 12 | Willem II | 14 | 14 |
| 13 | Heerenveen | 14 | 14 |
| 14 | Groningen | 14 | 13 |
| 15 | ADO Den Haag | 14 | 13 |
| 16 | Roda JC Kerk | 14 | 13 |
| 17 | NEC Nijmegen | 14 | 12 |
| 18 | RKC | 14 | 9 |
Barca and Real both won, Gers closed the gap on Celtic while Lyon and Marseille drew 5-5.
Sunderland fan Lucinda Gittins was strutting her stuff in the Soccer AM studios this week.
Barca were stunned by a late leveller, Gers' match was abandoned while Inter march on in Serie A.
PSV Eindhoven closed the gap on leaders FC Twente with a 4-0 win over Heracles, while Ajax thumped Heerenveen 5-1.
Twente midfielder Theo Janssen has suffered minor injuries after being involved in a car accident.
FC Twente have moved clear of PSV Eindhoven, RKC and AZ both won while NAC shared a six-goal thriller.
Groningen are waiting to discover if Oluwafemi Ajilore will be available to face RKC Waalwijk.
Roda JC Kerkrade have been unable to sign trialist Sebastian Svard due to financial constraints.