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:
| Game | Date | Opponent | Score | Location/Attendance | Record | Streak |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | Nov 1 | Sacramento Kings | 93–67 | Ford Center | 1–0 | Won 1 |
| 2.0 | Nov 2 | @ Cleveland Cavaliers | 87–109 | Quicken Loans Arena | 1–1 | Lost 1 |
| 3.0 | Nov 5 | @ Houston Rockets | 91–84 | Toyota Center | 2–1 | Won 1 |
| 4.0 | Nov 9 | Orlando Magic | 83–88 | Ford Center | 2–2 | Lost 1 |
| 5.0 | Nov 12 | Dallas Mavericks | 103–109 | Ford Center | 2–3 | Lost 2 |
| 6.0 | Nov 15 | @ Miami Heat | 102–109 (OT) | AmericanAirlines Arena | 2–4 | Lost 3 |
| 7.0 | Nov 16 | Denver Nuggets | 81–91 | Ford Center | 2–5 | Lost 4 |
| 8.0 | Nov 18 | Atlanta Hawks | 95–92 | Ford Center | 3–5 | Won 1 |
| 9.0 | Nov 19 | @ Orlando Magic | 98–95 | Amway Arena | 4–5 | Won 2 |
| 10.0 | Nov 21 | @ Philadelphia 76ers | 91–103 | Wachovia Center | 4–6 | Lost 1 |
| 11.0 | Nov 23 | Minnesota Timberwolves | 84–80 | Ford Center | 5–6 | Won 1 |
| 12.0 | Nov 26 | @ Seattle SuperSonics | 105–99 | KeyArena | 6–6 | Won 2 |
| 13.0 | Nov 28 | @ Golden State Warriors | 83–99 | Oracle Arena | 6–7 | Lost 1 |
| 14.0 | Nov 30 | @ Denver Nuggets | 102–95 | Pepsi Center | 7–7 | Won 1 |
Question:
When did they play at the wachovia center?
Answer:
Nov 21