Roberto Mancini was disappointed after Inter Milan's 2-1 defeat of Napoli.
"At the start we struggled a little with their extra man in midfield, but we still created several scoring opportunities and should have locked down the result earlier, said Mancio.
"Sosa's goal made us apprehensive at the end and it was something we could have avoided."
Julio Cruz bagged a first half brace to secure the win, taking his seasonal tally to three goals in just 204 minutes of football - a goal on average every 68 minutes.
"I chose Cruz to start because he was fresh after missing the midweek Champions League tie on a ban. All the strikers are doing well," insisted the Inter boss.
