The ATP Challenger Tarragona (officially: Open Tarragona Costa Daurada ) was a tennis tournament that was held annually in Tarragona , Spain from 2006 to 2010 . It was part of the ATP Challenger Tour and was played outdoors on clay. In 1981 and 1982 there was already one event at the same location. Alberto Martín was the only player to win the tournament twice in singles. Marcel Granollers also won once each in singles and doubles.