Marques was eventually called up to the first team squad for Leeds' 2–1 victory against Coventry City on 1 January 2007, where he turned in a solid performance at centre-back. This performance saw Marques being rewarded with a long run in the starting lineup at Elland Road. With questions mounting about whether his contract would be extended, Marques stated he would prefer to concentrate on Leeds' relegation battle than signing a new deal. He was an instant hit with the fans. Despite some impressive performances, Marques' efforts were not enough to save Leeds from relegation to League One for the first time in club history. Nonetheless, Marques showed his commitment to the club and signed a new contract on 7 August 2007.