- Nationality
Netherlands- Position
- Verdediger
- Geboortedatum
- 01-04-1973
- Geboorteplaats
- Bilthoven
- Achternaam
- Vierklau
- Voornaam
- Ferdi
- Lengte
- 178
- Gewicht
- 78
- Past Teams
- Ajax, FC Utrecht, Vitesse
Debuut als prof: 14 september 1991: FC Utrecht – FC Twente 1-1.
Laatste wedstrijd als prof: 31 maart 2002: Vitesse – Ajax 3-1 (na 57 minuten vervangen door Tomás Galásek).
Interlanddebuut Nederland: 5 oktober 1996: Wales – Nederland 1-3 (na 71 minuten vervangen door Pierre van Hooijdonk).
Kwalificatie Champions League
| Season | Club | Appearances | Minutes | Basis | Bank | Gewisseld | Ingevallen | Goals | Penalty | Penalty gemist | Assists | Yellow Cards | Yellow/Red Card | Red Cards | Own goals |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2001-2002 | Ajax | 1 | 62 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | - | 1 | 62 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Nederlandse Eredivisie
| Season | Club | Appearances | Minutes | Basis | Bank | Gewisseld | Ingevallen | Goals | Penalty | Penalty gemist | Assists | Yellow Cards | Yellow/Red Card | Red Cards | Own goals |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2001-2002 | Ajax | 6 | 414 | 6 | 2 | 3 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| Total | - | 6 | 414 | 6 | 2 | 3 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
Nederlandse KNVB Beker
| Season | Club | Appearances | Minutes | Basis | Bank | Gewisseld | Ingevallen | Goals | Penalty | Penalty gemist | Assists | Yellow Cards | Yellow/Red Card | Red Cards | Own goals |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2001-2002 | Ajax | 1 | 90 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | - | 1 | 90 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Career Total
| Season | Appearances | Minutes | Basis | Bank | Gewisseld | Ingevallen | Goals | Penalty | Penalty gemist | Assists | Yellow Cards | Yellow/Red Card | Red Cards | Own goals |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1990-1991 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1991-1992 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1992-1993 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1993-1994 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1994-1995 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1995-1996 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1996-1997 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1998-1999 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1999-2000 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2000-2001 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 2001-2002 | 8 | 566 | 8 | 3 | 4 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| Total | 8 | 566 | 8 | 3 | 4 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |