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 | Game site | Attendance |
| --- | --- | --- | --- | --- | --- |
| 1.0 | 1961-09-09 | at Boston Patriots | W 21–20 | Nickerson Field | 16,684 |
| 2.0 | 1961-09-17 | at Buffalo Bills | L 41–31 | War Memorial Stadium | 15,584 |
| 3.0 | 1961-09-24 | Denver Broncos | W 35–28 | Polo Grounds | 14,381 |
| 4.0 | 1961-10-01 | Boston Patriots | W 37–30 | Polo Grounds | 15,189 |
| 5.0 | Bye | Bye | Bye | Bye | Bye |
| 6.0 | 1961-10-15 | San Diego Chargers | L 25–10 | Polo Grounds | 25,136 |
| 7.0 | 1961-10-22 | at Denver Broncos | L 27–10 | Bears Stadium | 12,508 |
| 8.0 | 1961-10-29 | at Oakland Raiders | W 14–6 | Candlestick Park | 7,138 |
| 9.0 | 1961-11-05 | at San Diego Chargers | L 48–13 | Balboa Stadium | 33,391 |
| 10.0 | 1961-11-11 | Oakland Raiders | W 23–12 | Polo Grounds | 16,311 |
| 11.0 | 1961-11-19 | at Houston Oilers | L 49–13 | Jeppesen Stadium | 33,428 |
| 12.0 | 1961-11-23 | Buffalo Bills | W 21–14 | Polo Grounds | 12,023 |
| 13.0 | 1961-12-03 | Dallas Texans | W 28–7 | Polo Grounds | 14,117 |
| 14.0 | 1961-12-10 | Houston Oilers | L 48–21 | Polo Grounds | 9,462 |
| 15.0 | 1961-12-17 | at Dallas Texans | L 35–24 | Cotton Bowl | 12,500 |
Question:
Which date featured the Boston Patriots as the opponent?
Answer:
1961-10-01