2003 CONCACAF Champions' Cup

The 2003 CONCACAF Champions' Cup was the 38th edition of the annual international club football competition held in the CONCACAF region (North America, Central America and the Caribbean), the CONCACAF Champions' Cup. It was won by Club Toluca after a 5–4 aggregate win over countryfellow club Morelia in the final. The tournament was held between March 6 and October 8. The 16-team format was scrapped for an eight-team format in 2004.

North American zone
🇲🇽 Club Toluca - 2002 Apertura champion 🇲🇽 Morelia - 2002 Apertura runner-up 🇲🇽 Club América - 2002 Verano champion 🇲🇽 Club Necaxa - 2002 Verano runner-up 🇺🇸 Los Angeles Galaxy - 2002 MLS Cup champion and 2002 MLS Supporters Shield winner 🇺🇸 New England Revolution - 2002 MLS Cup runner-up 🇺🇸 San Jose Earthquakes - 2002 MLS Supporters Shield runner-up 🇺🇸 Columbus Crew - 2002 U.S. Open Cup winner

Central American zone
🇨🇷 Alajuelense – 2002 UNCAF Interclub Cup winner 🇵🇦 Árabe Unido – 2002 UNCAF Interclub Cup runner-up 🇭🇳 Motagua – 2002 UNCAF Interclub Cup third place 🇬🇹 Comunicaciones – 2002 UNCAF Interclub Cup fourth place 🇬🇹 Municipal – 2002 UNCAF Interclub Cup first stage runner-up 🇸🇻 FAS – 2002 UNCAF Interclub Cup first stage runner-up

Caribbean zone
🇹🇹 W Connection - 2002 CFU Club Championship finalist 🇯🇲 Arnett Gardens - 2002 CFU Club Championship finalist

Semifinals

 * Morelia advanced 6–0 on aggregate.
 * Toluca advanced 5–4 on aggregate.

Second leg

 * Toluca won 3–1 on points (5–4 on aggregate).