Marcos VinÃÂcius 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.
In December 2016, Thank was signed by new I-League entrant, Chennai City F.C. 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.