Marcos Martinez Ucha (born October 15, 1985 in Madrid, Spain) is a professional racecar driver. Martinez Ucha competed in karting events from 1998 until 2002, when he entered Spanish Formula Junior. He would stay there with moderate success for three years, moving to Spanish Formula Three in 2005 with the team Racing Engineering and reaching the 2nd place in the B-Class. In 2006 he jumped to the A-Class, managing an outstanding victory in Cheste, Valencia. Meanwhile he participated in three races in the World Series by Renault, where he managed to start forth in the grid and run in the 2nd position in one of the races. In 2007, he began racing Spanish Formula Three with a new team, Novoteam. After 3 meetings and due to the results obtained he changed to Tec-Auto searching for an improvement in the championship.
He was due to take part in the latter part of the 2007 GP2 Series season for the Racing Engineering team, alongside Javier Villa and replacing Ernesto Viso. However, he will not compete in the races of the first meeting he has entered for, as he failed to lap within 107% of the pole position time after problems in qualifying.