The Rossoneri have completed deals for the exciting talents of Portuguese striker Andre Silva and Turkish playmaker Hakan Calhanoglu in what has been an unusually ambitious off-season for the club.
“All I can say is I’ve never known a summer like this,” Bonaventura told Gazzetta dello Sport.
“We’ve bought players who, at the start of the transfer window, you think ‘yeah it’d be nice if they came’… well they really did come!”
Perhaps the most surprising arrival is centre-back Leonardo Bonucci, who few would have expected to leave champions Juventus, with whom he has won six Scudetti across seven seasons.
“Leo is a winner, a pillar of the national team and his arrival is a fantastic thing,” Bonaventura said. “I didn’t seriously think he’d come.
“From what I know of him, his character will be very useful in the dressing room which is coming from troubled years, he’s destined to become a real point of reference.
“Will he be captain? It’s up to [Coach Vincenzo] Montella. Everyone has to be a bit of a captain though, and then in its heart a group knows who the real leader is.”