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:
| Result | Record | Opponent | Method | Event | Round | Location |
| --- | --- | --- | --- | --- | --- | --- |
| Win | 6-0 | Phillip Hellesoe | TKO | Sky City Convention Centre | 2.0 | Auckland, New Zealand |
| Win | 5-0 | Jeremiah Constant | TKO | Caesars Tahoe | 1.0 | Stateline, Nevada, USA |
| Win | 4-0 | James Auimatagi | TKO | ABA Stadium | 2.0 | Kohimarama, New Zealand |
| Win | 3-0 | Richard Tutaki | KO | ASB Stadium | 2.0 | Auckland, New Zealand |
| Win | 2-0 | Bob Gasio | TKO | ABA Stadium | 3.0 | Auckland, New Zealand |
| Win | 1-0 | Toa Naketoatama | Decision | ABA Stadium | 4.0 | Kohimarama, New Zealand |
Question:
What is the smallest round to have a record of 4-0?
Answer:
2.0