Former Real Madrid captain Sergio Ramos scored the first goal of his Monterrey career as the Mexican side beat Santos Laguna 4-2 at the Estadio BBVA.
The 38-year-old joined the Liga MX side in February after leaving boyhood club Sevilla at the end of the 2023-24 season.
Ramos, a World Cup winner with Spain in 2010, headed in a cross from a corner to put his side 2-1 in front.
It was the 120th goal of Ramos' club career, having netted 101 times for Real Madrid, six goals for Paris St-Germain and seven for Sevilla.
Former Spain international Sergio Canales put Monterrey in front again after Laguna equalised, with Mexico's Gerardo Arteaga scoring late in injury time to round off victory.
The win helped Monterrey climb to ninth in the table, 11 points behind league leaders Leon.