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:
| Edition | Round | Date | Against | Surface | Opponent | Win/Lose | Result |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 2010 Europe/Africa Zone Group I | QF | 7–8 May 2010 | Ukraine | Clay | Sergiy Stakhovsky | Lose | 2–6, 7–6 (7–3) , 5–7, 5–7 |
| 2010 World Group Play-offs | Play-off | 17–19 September 2010 | Ecuador | Clay | Giovanni Lapentti | Win | 6–7 (2–7) , 4–6, 6–3, 6–4, 6–1 |
| 2010 World Group Play-offs | Play-off | 17–19 September 2010 | Ecuador | Clay | Emilio Gómez | Win | 6–3, 6–4 |
| 2011 World Group | 1R | 4–6 March 2011 | Argentina | Clay | David Nalbandian | Lose | 3–6, 2–6, 7–5, 4–6 |
| 2011 World Group | 1R | 4–6 March 2011 | Argentina | Clay | Juan Mónaco | Win | 6–4, 2–6, 6–3 |
| 2011 World Group Play-offs | Play-off | 16–18 September 2011 | Czech Republic | Clay | Radek Štěpánek | Lose | 3–6, 2–6, 0–6 |
| 2013 Europe/Africa Zone Group I | 1R | 1–3 February 2013 | Denmark | Hard (indoor) | Martin Pedersen | Win | 6–2, 7–6 (7–3) , 4–6, 4–6, 6–2 |
Question:
In what edition is Ungur's opponent David Nalbandian?
Answer:
2011 World Group