Juventus chief executive Jean-Claude Blanc said the club will sign a star player in the summer.
Juve are currently trailing Inter by seven points in Serie A with only nine games remaining.
Following their elimination from the Champions League by Chelsea earlier this month, club coach Claudio Ranieri said they needed bigger stars to compete for the major honours.
And Blanc has now promised him at least one big-name signing this summer.
“I’m not talking about the transfer market but what I can tell you is that we will buy a star player,” Frenchman Blanc told investors at a conference in Milan.
“One who can herald a new era of success.”
Juve cannot afford to lose any more ground on leaders Inter ahead of the pair’s clash in Turin next month.
Were they to win that and cut the gap between the two to no more than four points, Juve would be in with a chance of claiming their first title since 2003.
“We’ll see what shape we’re in at the direct clash between the two teams,” added Blanc.
“Until it’s mathematically impossible, we’ll keep fighting.”