| Marcos Thank | |
| Fullname: | Marcos Vinícius Costa Guedes |
| Birth Date: | 1992 12, df=yes |
| Birth Place: | Brazil |
| Currentclub: | Chennai City FC |
| Clubnumber: | 10 |
| Position: | Striker |
| Years1: | 2011–2013 |
| Years2: | 2014 |
| Years3: | 2015 |
| Years4: | 2016 |
| Years5: | 2017– |
| Clubs1: | – |
| Clubs2: | – |
| Clubs3: | – |
| Clubs4: | GDSC Alvarenga |
| Clubs5: | Chennai City FC |
| Caps5: | 4 |
| Goals5: | 2 |
| Club-Update: | 8 January 2017 |
Marcos Vinícius Costa Guedes (born 16 December 1992), better known as Marcos Thank, is a Brazilian footballer who was signed for I-league club Chennai City FC.[1]
In December 2016, Thank was signed by new I-League entrant, Chennai City F.C.[1] [2] He made his debut against Minerva Punjab, when he was substituted on 82nd minute. He scored his first goal for the club on 21 January 2017 in a home game against Mohun Bagan and also became the club's first ever goalscorer.[3]