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:
| Round | Opponents | Home | Away | Aggregate |
| --- | --- | --- | --- | --- |
| 1 | Keflavik | 2–1 | 0–1 | 2–2 ( a ) |
| 1 | Bayer Leverkusen | 1–4 | 0–3 | 1–7 |
| Q1 | Racing Union Luxembourg | 7–1 | 3–0 | 10–1 |
| Q2 | AA Gent | 4–0 | 1–2 | 5–2 |
| 1 | Feyenoord | 2–1 | 0–1 | 2–2 ( a ) |
| Q1 | EB/Streymur | 1–0 | 3–0 | 4–0 |
| Q2 | Dacia | 0–0 | 2–0 | 2–0 |
| Q3 | Levski Sofia | 1–1 | 2-5 | 3-6 |
Question:
What is the Aggregate of Bayer Leverkusen opponents?
Answer:
1–7