The 27-year-old has been linked with a host of clubs across Europe after scoring two goals in two games for his country during the group stage of the tournament.
Despite reported interest from elsewhere, Martinez is determined to focus all of his energy on helping Colombia get as far as they can out in Brazil.
"It is not about me, we are just focused and together as a team," he is quoted as saying by Sky Sports News. "I will not think about my future until after the World Cup.
"I am happy with my work so far, but we are together as a team and that is very important for us."
Martinez scored 23 goals in 41 games for Porto during the 2013-14 season.