Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Stage | Winner | General classification | Points classification | Mountains classification | Combination classification | Team classification |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | ONCE-Eroski | Igor González de Galdeano | Igor González de Galdeano | Jan Hruška | Igor González de Galdeano | ONCE-Eroski |
| 2.0 | Luis Pérez | Joaquim Rodríguez | Joaquim Rodríguez | Luis Pérez | Luis Pérez | ONCE-Eroski |
| 3.0 | Alessandro Petacchi | Joaquim Rodríguez | Joaquim Rodríguez | Luis Pérez | Luis Pérez | ONCE-Eroski |
| 4.0 | Unai Etxebarria | Isidro Nozal | David Etxebarria | Félix Cárdenas | Isidro Nozal | ONCE-Eroski |
| 5.0 | Alessandro Petacchi | Isidro Nozal | Alessandro Petacchi | Félix Cárdenas | Isidro Nozal | ONCE-Eroski |
| 6.0 | Isidro Nozal | Isidro Nozal | Alessandro Petacchi | Félix Cárdenas | Isidro Nozal | ONCE-Eroski |
| 7.0 | Michael Rasmussen | Isidro Nozal | Alessandro Petacchi | Félix Cárdenas | Isidro Nozal | ONCE-Eroski |
| 8.0 | Joaquim Rodríguez | Isidro Nozal | Joaquim Rodríguez | Joan Horrach | Isidro Nozal | ONCE-Eroski |
| 9.0 | Alejandro Valverde | Isidro Nozal | Isidro Nozal | Félix Cárdenas | Isidro Nozal | ONCE-Eroski |
| 10.0 | Erik Zabel | Isidro Nozal | Alessandro Petacchi | Félix Cárdenas | Alejandro Valverde | ONCE-Eroski |
| 11.0 | Erik Zabel | Isidro Nozal | Erik Zabel | Félix Cárdenas | Alejandro Valverde | ONCE-Eroski |
| 12.0 | Alessandro Petacchi | Isidro Nozal | Erik Zabel | Félix Cárdenas | Isidro Nozal | ONCE-Eroski |
| 13.0 | Isidro Nozal | Isidro Nozal | Erik Zabel | Félix Cárdenas | Isidro Nozal | ONCE-Eroski |
| 14.0 | Alessandro Petacchi | Isidro Nozal | Alessandro Petacchi | Félix Cárdenas | Isidro Nozal | ONCE-Eroski |
| 15.0 | Alejandro Valverde | Isidro Nozal | Erik Zabel | Félix Cárdenas | Alejandro Valverde | ONCE-Eroski |
| 16.0 | Félix Cárdenas | Isidro Nozal | Erik Zabel | Félix Cárdenas | Alejandro Valverde | ONCE-Eroski |
| 17.0 | David Millar | Isidro Nozal | Erik Zabel | Félix Cárdenas | Alejandro Valverde | ONCE-Eroski |
| 18.0 | Pedro Diaz Lobato | Isidro Nozal | Erik Zabel | Félix Cárdenas | Alejandro Valverde | ONCE-Eroski |
| 19.0 | Filippo Simeoni | Isidro Nozal | Erik Zabel | Félix Cárdenas | Alejandro Valverde | ONCE-Eroski |
| 20.0 | Roberto Heras | Roberto Heras | Alejandro Valverde | Félix Cárdenas | Alejandro Valverde | iBanesto.com |
| 21.0 | Alessandro Petacchi | Roberto Heras | Erik Zabel | Félix Cárdenas | Alejandro Valverde | iBanesto.com |
Question:
How many combination classifications have the winner as Erik Zabel and a points classification as Alessandro Petacchi
Answer:
1.0