| qualifying for | 3.42 | An qualifying for the second phase. | ||
| qualifying round | 1.58 | The winner of the match goes into the World Group qualifying round. | ||
| qualifying on | 1.32 | There is another qualifying on Thursday. | ||
| qualifying in | 1.12 | Weather forced cancellation of NCTS qualifying in June. | ||
| qualifying at | 0.59 | Practice and qualifying at Road America begin Friday. |