Mental toughness is a multidimensional trait captured by the MTQ-48, comprising the 4Cs: Control, Commitment, Challenge, and Confidence. The Control and Commitment dimensions are often interpreted collectively as reflecting resilience under stress, while Challenge and Confidence reflect one's capacity to adapt and self-belief. In competitive individual sports, attentional concentration is also critical; enhancing mental toughness may thus support concentration under pressure. The current study tested the association between mental toughness subscales and concentration in national athletes from individual sports in the Philippines. We hypothesized positive correlations, especially for the Control and Commitment (resilience-related) subscales. We used a descriptive correlational design with 75 national-level Filipino athletes (26 women, 49 men) competing in individual sports during the 2017 Southeast Asian Games. Participants completed the MTQ-48 (48 items, 5-point Likert scale) and a validated concentration (attentional focus) subscale (range 1-5). Mean and SD for each mtq subscale and the concentration score were computed; Pearson correlations (two-tailed) assessed relationships. Athletes' mean subscale scores (range 1-5) were: Control M = 3.87 (SD = 0.62), Commitment M = 4.05 (SD = 0.58), Challenge M = 3.92 (SD = 0.55), Confidence M = 4.12 (SD = 0.60). Concentration mean was 4.36 (SD = 0.47). The strongest correlation emerged between commitment and concentration, r = .535, p < .05, 95% CI [.28, .72]. Other subscales also showed moderate positive correlations (Control: r = .42; Confidence: r = .38; Challenge: r = .31). The findings support that higher scores on MTQ-48, especially in goal-directed persistence (Commitment), are significantly linked to better concentration in competitive conditions. Mental-skills training for athletes might beneficially target the Commitment component to enhance attentional focus. Implications include integrating mental-toughness workshops into coaching curricula to support athlete well-being and performance, particularly in resource-limited settings.