The Blues fell short in both the Premier League and the Champions League, and whilst Mourinho's side were fairly solid defensively, they simply didn't get big enough contributions from their strikers. Samuel Eto'o, Demba Ba and Fernando Torres all failed to score on a consistent basis, leaving Mourinho to look towards the transfer window for solutions.
Eto'o has already left the club upon the expiration of his contract, whilst Ba has recently been in talks with Besiktas over a move to Turkey, and Torres could also be heading towards the exit door after failing to repay his £50m transfer fee from Liverpool in 2011.
Atletico Madrid's Diego Costa is widely expected to arrive at Stamford Bridge sooner rather than later, but even then, Mourinho will need to add more striking depth behind the Spanish international - and it seems he could look towards one of his former clubs to find another hitman.
Mourinho enjoyed a superb spell with Inter Milan, but he could come back to hurt them after Sky Italia revealed that he has set his sights on Inter's young Argentine striker Icardi. The 21-year-old burst onto the scene in 2013 with Sampdoria, leading to a move to Inter last summer, and whilst he has mostly been used as a substitute, his potential has been there for all to see, ending with 10 goals in just 12 starts.
Seemingly no stranger to the super-sub role, Icardi would almost certainly assume that role once again behind Costa, but at just 21, the former Barcelona man would be given time to develop before growing into an increased role over time.
The speculation also suggested that Icardi was second choice for Chelsea behind Real Madrid's Alvaro Morata, btu with interest growing in him from elsewhere, Icardi should be easier - and cheaper - to secure for Chelsea.