João Baptista Martins (3 September 1927 – 18 November 1993) was a Portuguese footballer who played as a midfielder for CUF Barreiro and Sporting CP.
In 1955, he scored the first goal in the history of the European Cup (now UEFA Champions League).
It was on 4 September, the first day of the first edition of the tournament.
Sporting played FK Partizan, from Yugoslavia, at the Estádio Nacional in Lisbon.
Martins scored the opening goal of the match in the 14th minute; the game ended in a 3–3 draw.