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:
| Week | Date | Opponent | Result | Record | Attendance |
| --- | --- | --- | --- | --- | --- |
| 1.0 | September 17, 1972 | at Kansas City Chiefs | W 20–10 | 1–0 | 79829.0 |
| 2.0 | September 24, 1972 | Houston Oilers | W 34–13 | 2–0 | 77821.0 |
| 3.0 | October 1, 1972 | at Minnesota Vikings | W 16–14 | 3–0 | 47900.0 |
| 4.0 | October 8, 1972 | at New York Jets | W 27–17 | 4–0 | 63841.0 |
| 5.0 | October 15, 1972 | San Diego Chargers | W 24–10 | 5–0 | 80010.0 |
| 6.0 | October 22, 1972 | Buffalo Bills | W 24–23 | 6–0 | 80010.0 |
| 7.0 | October 29, 1972 | at Baltimore Colts | W 23–0 | 7–0 | 60000.0 |
| 8.0 | November 5, 1972 | at Buffalo Bills | W 30–16 | 8–0 | 46206.0 |
| 9.0 | November 12, 1972 | New England Patriots | W 52–0 | 9–0 | 80010.0 |
| 10.0 | November 19, 1972 | New York Jets | W 28–24 | 10–0 | 80010.0 |
| 11.0 | November 27, 1972 | St. Louis Cardinals | W 31–10 | 11–0 | 80010.0 |
| 12.0 | December 3, 1972 | at New England Patriots | W 37–21 | 12–0 | 60999.0 |
| 13.0 | December 10, 1972 | at New York Giants | W 23–13 | 13–0 | 62728.0 |
| 14.0 | December 16, 1972 | Baltimore Colts | W 16–0 | 14–0 | 80010.0 |
Question:
When was the earliest that New England Patriots played?
Answer:
9.0