Prior to the 2017–18 season, Cavani was joined at the club by Brazilian forward Neymar, who moved to PSG in a transaction worth €222 million making him the world's most expensive player, and 18-year-old French prodigy Kylian Mbappé, a loan signing with the club having an option to sign him for €180 million. Cavani, Neymar and Mbappé immediately formed a formidable attacking trio, with Cavani scoring in each of PSG's opening three games of the 2017–18 UEFA Champions League group stage, twice in the team's 5–0 win at Celtic, once in the 3–0 win at home to Bayern Munich, and once in the 4–0 win at Anderlecht.