Defending champion Lleyton Hewitt defeated Juan Carlos Ferrero in the final, 7–5, 7–5, 2–6, 2–6, 6–4 to win the singles tennis title at the 2002 Tennis Masters Cup. With the victory, Hewitt secured the year-end number 1 ranking for the second successive year, becoming one of only seven men (at the time) to achieve this feat. Future six-time champion Roger Federer made his tournament debut; he was defeated by Hewitt in the semifinals.

Seeds

• # 🇦🇺 Lleyton Hewitt (champion) • # 🇺🇸 Andre Agassi (round robin, withdrew due to a hip injury) • # 🇷🇺 Marat Safin (round robin) • # 🇪🇸 Juan Carlos Ferrero (final) • # 🇪🇸 Carlos Moyá (semifinals) • # Roger Federer (semifinals) • # 🇨🇿 Jiří Novák (round robin) • # 🇪🇸 Albert Costa (round robin)

Alternate

• # 🇸🇪 Thomas Johansson (replaced Agassi, round robin)

Draw

Finals

Red group

''Standings are determined by: 1. number of wins; 2. number of matches; 3. in two-players-ties, head-to-head records; 4. in three-players-ties, percentage of sets won, or of games won; 5. steering-committee decision.''

Gold group

''Standings are determined by: 1. number of wins; 2. number of matches; 3. in two-players-ties, head-to-head records; 4. in three-players-ties, percentage of sets won, or of games won; 5. steering-committee decision.''