El Ghazi, who can either play in a lone striker's role or wide, has joined from Ajax on a deal until the summer of 2021.
The Copa Libertadores final will continue to be played with home and away legs in the stadiums of the finalists in 2017, CONMEBOL said.
Olimpia will be strong favourites to claim their fourth Copa Libertadores title after a 2-0 home win in the first-leg of the final against Atletico Mineiro
Paraguay's Olimpia have reached the quarter-finals of the Copa Libertadores after a 2-0 win over Tigre
Real Garcilaso managed to secure a place in the last 16 despite losing to Santa Fe in the Copa Libertadores at the expense of Deportes
Newell's Old Boys travelled to Paraguay's Olimpia needing just a point to secure their place in the knockout stages of the Copa Libertadores.