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:
| Round | Main date | Number of fixtures | Clubs | New entries this round |
| --- | --- | --- | --- | --- |
| Preliminary round | 29 August 2007 | 16.0 | 48 → 32 | none |
| First round | 26 September 2007 | 16.0 | 32 → 16 | 16 |
| Second round | 24 October 2007 | 8.0 | 16 → 8 | none |
| Quarter-finals | 7 and 28 November 2007 | 8.0 | 8 → 4 | none |
| Semi-finals | 9 and 23 April 2008 | 4.0 | 4 → 2 | none |
| Final | 7 and 14 May 2008 | 2.0 | 2 → 1 | none |
Question:
What is the Clubs when there are 4 for the number of fixtures?
Answer:
4 → 2