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:
| Outcome | Date | Surface | Opponent | Score |
| --- | --- | --- | --- | --- |
| Winner | 14 June 2009 | Grass | Li Na | 6–0, 7–6 (7–2) |
| Winner | 19 February 2011 | Hard (i) | Rebecca Marino | 6–2, ret. |
| Runner-up | 24 September 2011 | Hard | Chanelle Scheepers | 2–6, 2–6 |
| Winner | 4 August 2012 | Hard | Anastasia Pavlyuchenkova | 6–1, 6–1 |
| Winner | 4 August 2013 | Hard | Andrea Petkovic | 6–4, 7–6 (7–2) |
Question:
Who was the opponent on 19 February 2011?
Answer:
Rebecca Marino