The Chile international has signed for the Spanish club until the end of the season, and could make his debut against Espanyol at the weekend.
Vargas moved to the Italian outfit from Universidad de Chile in 2012, but has struggled to secure a regular first-team spot in Naples.
The 24-year-old was allowed to move to Gremio on loan in January 2013, only to later return to his parent club.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Barcelona | 12 | 11 | 0 | 1 | 40 | 11 | 29 | 33 |
| 2 | Real Madrid | 11 | 7 | 3 | 1 | 21 | 11 | 10 | 24 |
| 3 | Atletico MadridAtletico | 12 | 6 | 5 | 1 | 18 | 7 | 11 | 23 |
| 4 | Villarreal | 11 | 6 | 3 | 2 | 20 | 19 | 1 | 21 |
| 5 | Osasuna | 12 | 6 | 3 | 3 | 17 | 16 | 1 | 21 |
| 6 | Athletic Bilbao | 12 | 5 | 4 | 3 | 18 | 12 | 6 | 19 |
| 7 | Real BetisBetis | 12 | 5 | 4 | 3 | 12 | 10 | 2 | 19 |
| 8 | Mallorca | 12 | 5 | 3 | 4 | 10 | 9 | 1 | 18 |
| 9 | Rayo Vallecano | 11 | 4 | 4 | 3 | 12 | 10 | 2 | 16 |
| 10 | Celta Vigo | 12 | 5 | 1 | 6 | 18 | 20 | -2 | 16 |
| 11 | Real Sociedad | 12 | 4 | 3 | 5 | 10 | 10 | 0 | 15 |
| 12 | GironaGirona | 12 | 4 | 3 | 5 | 15 | 17 | -2 | 15 |
| 13 | Sevilla | 12 | 4 | 3 | 5 | 12 | 17 | -5 | 15 |
| 14 | AlavesAlaves | 12 | 4 | 1 | 7 | 14 | 19 | -5 | 13 |
| 15 | Leganes | 12 | 2 | 5 | 5 | 12 | 16 | -4 | 11 |
| 16 | Getafe | 12 | 1 | 7 | 4 | 8 | 10 | -2 | 10 |
| 17 | Espanyol | 12 | 3 | 1 | 8 | 11 | 22 | -11 | 10 |
| 18 | Las PalmasLas Palmas | 12 | 2 | 3 | 7 | 13 | 21 | -8 | 9 |
| 19 | Real ValladolidValladolid | 12 | 2 | 2 | 8 | 9 | 24 | -15 | 8 |
| 20 | Valencia | 11 | 1 | 4 | 6 | 8 | 17 | -9 | 7 |
| > La Liga Full Table | |||||||||
