| Cossa | |
| Fullname: | Marco Antonio Alvarez Ferreira |
| Birth Date: | 20 July 1964 |
| Birth Place: | Brazil |
| Height: | 1.860NaN0 |
| Position: | Goalkeeper |
| Years1: | 1979 |
| Clubs1: | Santos |
| Years2: | 1981 |
| Clubs2: | Jabaquara |
| Years3: | 1983–1985 |
| Clubs3: | Portuguesa Santista |
| Years4: | 1987 |
| Clubs4: | Juventus-SP |
| Years5: | 1990 |
| Clubs5: | Nacional |
| Years6: | 1991 |
| Clubs6: | XV de Piracicaba |
| Years7: | 1994 |
| Clubs7: | Portuguesa Santista |
| Years8: | 1995 |
| Clubs8: | São Bento |
| Years9: | 1996 |
| Clubs9: | Fortaleza |
| Years10: | 1996 |
| Clubs10: | Confiança |
| Nationalyears1: | 1986–1987 |
| Nationalteam1: | Brazil U23 |
| Manageryears1: | 2000–2003 |
| Managerclubs1: | Suwon Samsung Bluewings (goalkeeping coach) |
| Manageryears2: | 2003 |
| Managerclubs2: | Chunnam Dragons (goalkeeping coach) |
| Manageryears3: | 2005–2008 |
| Managerclubs3: | South Korea (goalkeeping coach) |
| Manageryears4: | 2008 |
| Managerclubs4: | Persepolis (assistant) |
| Manageryears5: | 2009–2012 |
| Managerclubs5: | Al Dhafra FC (goalkeeping coach) |
| Manageryears6: | 2013–2014 |
| Managerclubs6: | Shimizu S-Pulse (goalkeeping coach) |
| Manageryears7: | 2016 |
| Managerclubs7: | Buriram United (assistant) |
| Manageryears8: | 2016–2018 |
| Managerclubs8: | Shijiazhuang Ever Bright F.C. (goalkeeping coach) |
| Manageryears9: | 2018–2019 |
| Managerclubs9: | Foolad (assistant) |
| Manageryears10: | 2019 |
| Managerclubs10: | Shijiazhuang Ever Bright F.C. (goalkeeping coach) |
Marco Antonio Alvarez Ferreira, aka Cosa, or Cossa (born July 20, 1964) is a Brazilian goalie coach and former player. He attended the 2004 Summer Olympics.
He played for the following clubs: Santos (1979), Jabaquara (1981), Portuguesa Santista (1983–1985, 1994), Juventus-SP (1987), Nacional (1990), XV de Piracicaba (1991), São Bento (1995), Fortaleza (1996) and Confiança (1996).
He is a former Portuguesa Santista goalkeeper coach, and he has become the goalkeeper coach of South Korea national football team when Pim Verbeek was hired to be the head coach of the team. He has been coaching as goalkeeper coach in several countries such as Iran FC Persepolis, UAE Al Dhafra FC, Japan Shimizu S-Pulse, Thailand Buriram United F.C. and China Shijiazhuang Ever Bright F.C., under Afshin Ghotbi [1]