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:
| Date | Opponent | Venue | Result | Scorers | Report |
| --- | --- | --- | --- | --- | --- |
| August 30, 2008 – 18:00 | Udinese | Away | Lost 1–3 | Bresciano | 18 |
| September 13, 2008 – 18:00 | AS Roma | Home | Won 3–1 | Miccoli (2), Cavani |  |
| September 21, 2008 – 15:00 | Genoa | Home | Won 2–1 | Bovo, Cavani | 4 |
| September 24, 2008 – 15:00 | Napoli | Away | Lost 2–1 | Miccoli |  |
| September 28, 2008 – 15:00 | Reggina | Home | Won 1–0 | Miccoli |  |
| October 5, 2008 – 15:00 | Juventus | Away | Won 2–1 | Miccoli, Mchedlidze |  |
| October 19, 2008 - 15:00 | Catania | Away | Lost 0–2 |  | Report |
| October 26, 2008 - 20:30 | Fiorentina | Home | Lost 1–3 | Simplício | Report |
| October 29, 2008 – 20:30 | Lecce | Away | Drew 1–1 | Cavani | Report |
| November 2, 2008 - 15:00 | Chievo | Home | Won 3–0 | Miccoli, Kjær, Cavani |  |
| November 8, 2008 - 18:00 | Torino | Away | Lost 0–1 |  | Report |
| November 15, 2008 - 20:30 | Internazionale | Home | Lost 0–2 |  | Report |
| November 23, 2008 - 15:00 | Bologna | Away | Drew 1–1 | Succi | Report |
| November 30, 2008 - 20:30 | AC Milan | Home | Won 3–1 | Miccoli, Cavani, Simplício | Report |
| December 7, 2008 - 15:00 | Cagliari | Away | Lost 0–1 |  | Report |
| December 14, 2008 - 15:00 | Siena | Home | Won 2–0 | Cassani, Simplício | Report |
| December 20, 2008 - 18:00 | Lazio | Away | Lost 0–1 |  | Report |
| January 11, 2009 - 15:00 | Atalanta | Home | Won 3–2 | Miccoli, Bresciano, Cavani | Report |
| January 18, 2009 - 15:00 | Sampdoria | Home | Won 2–0 | Bresciano (2) | Report |
| January 25, 2009 - 15:00 | Udinese | Home | Won 3–2 | Simplício (2), Cavani | Report |
| January 28, 2009 - 20:30 | AS Roma | Away | Lost 1–2 | Cavani | Report |
| February 1, 2009 - 15:15 | Genoa | Away | Lost 0–1 |  | Report |
| February 8, 2009 - 20:30 | Napoli | Home | Won 2–1 | Migliaccio, Simplício | Report |
| February 15, 2009 - 15:00 | Reggina | Away | Drew 0–0 |  | Report |
| February 21, 2009 - 20:30 | Juventus | Home | Lost 0–2 |  | Report |
| March 1, 2009 - 15:00 | Catania | Home | Lost 0–4 |  | Report |
| March 8, 2009 - 15:00 | Fiorentina | Away | Won 2–0 | Simplício, Miccoli | Report |
| March 15, 2009 - 15:00 | Lecce | Home | Won 5–2 | Cavani (2), Simplício, Miccoli, Kjær | Report |
| March 22, 2009 - 15:00 | Chievo | Away | Lost 0–1 |  | Report |
| April 5, 2009 - 15:00 | Torino | Home | Won 1–0 | Cavani | Report |
| April 19, 2009 - 15:00 | Internazionale | Away | Drew 2–2 | Cavani, Succi | Report |
| April 19, 2009 - 15:00 | Bologna | Home | Won 4–1 | Belleri (own goal), Kjær, Succi, Cavani | Report |
| April 26, 2009 - 15:00 | AC Milan | Away | Lost 0–3 |  | Report |
| May 3, 2009 - 15:00 | Cagliari | Home | Won 5–1 | Migliaccio, Miccoli, Tedesco, Cavani, Succi | Report |
| May 10, 2009 - 15:00 | Siena | Away | Lost 0–1 |  | Report |
| May 17, 2009 - 15:00 | Lazio | Home | Won 2–0 | Miccoli, Migliaccio | Report |
| May 24, 2009 - 15:00 | Atalanta | Away | Drew 2–2 | Succi, Miccoli | Report |
| May 31, 2009 - 15:00 | Sampdoria | Home | Drew 2–2 | Miccoli, Succi | Report |
Question:
the total number of different teams listed as an opponent
Answer:
19