This investigation aimed to compare the attacking styles of play (ASPs) between participants in the UEFA Champions League (UCL) and Copa Libertadores de América (CLA). 224 matches from the round of 16 to the semi-finals were analysed, including UEFA Champions League (n = 112, seasons 2017–2019 and 2020–2022) and Copa Libertadores (n = 112, seasons 2019–2022), comprising 31 teams from UCL and 37 teams from CLA. ...