Martinez won 4-6, 6-3, 6-4 over Federico Gaio in the first round of Cordoba on Tuesday.
Martinez built of his second-round appearance at the Australian Open last week with a victory over No. 125 Gaio. Martinez converted on four of six break points in the match, and the Spaniard held serve 80 percent of the time. The 22-year-old should be a sizable underdog when he takes on No. 4-seeded Laslo Djere in the second round.