Roma get Real Madrid, CSKA Moscow and Viktoria Plzen, while Inter are up against Barcelona, Tottenham Hotspur and PSV Eindhoven.
“Inter really got the worst of it,” Capello told Sky Sport Italia.
“Napoli had a very bad draw too and I think in both those groups it’ll be a three-way battle for the two qualifying spots. It’ll need a great Napoli and Inter from the very start to put themselves in a good position to go forward.
“Roma and Real Madrid are favourites to go through from their group, while Juve need to be wary of Valencia in Spain, as they are strong on their own turf.
“Having said that, Juve seem superior to all their opponents in that group.”
Capello was asked what the game of the group stage will be and chose the clashes in Anfield and the Stadio San Paolo.
“Liverpool and Napoli are two sides who both play very attacking football.”