It looks set to be an extremely busy summer at Chelsea after a season of what might have been at Stamford Bridge.
The Blues reached the semi-final of the Champions League and only managed to secure a third placed finish in the Premier League.
However, Jose Mourinho - who rejoined the club one year ago - has suggested on a number of occasions that 2014/15 will be the season his side reach their peak.
And, by all accounts, Atletico Madrid duo Diego Costa and Thibaut Courtois will be with his squad next season. The latter, of course, is already a Blues player, but has yet to make a senior appearance for the club.
The additions of Costa and Courtois will certainly help the club challenge on all fronts next season. Costa, who could join the Blues for £32 million this summer, is one of the most feared strikers in Europe and could be the man to score 20+ goals in attack for Mourinho's side.
Meanwhile Courtois, at just 22-years-old, is already recognised as one of the leading 'keepers in the world.
So, there's no doubt about it, Chelsea will be even stronger next season. However, when bringing players into the squad, star names will always be linked with moves away.
In recent time, both Romelu Lukaku and Petr Cech have been the topic of potential summer departures.
Of course, the duo have both endured very different careers at Stamford Bridge. Lukaku - who has been rated at around £25 million - has yet to really stamp his mark on the Blues side and has been forced out on loan on a number of occasions. Cech, however, is already a club legend, having been the side's No.1 for a decade.
Reports have indicated that Chelsea would be willing to let Cech leave for £10m, meaning along with Lukaku, the Blues could make £35m for the pair.
That doesn't seem bad business considering Costa and Courtois are set to join the team next season, but it's a route Mourinho and Co. shouldn't go down.
In-fact, Chelsea would be crazy to sell the pair. Cech has enjoyed - as already stated - an incredible stint as the Blues' main man, and shouldn't be sold for an unproven Premier League player.
It's clear for all to see, Courtois will become a world class 'keeper, but that doesn't mean he's quite ready to fill Cech's gloves just yet. At 31-years-old, the Blues shot-stopper could have at least another five years at the top left in him.
Lukaku, on the other hand, is a different story. He's a youngster, developing with every kick of a ball. The Belgian starlet has been compared to club legend Didier Drogba in some quarters and can become a major hit in time at the Bridge.
With Costa potentially acting as Mourinho's main man in attack, Lukaku will be the ideal candidate to step in for him if he's having an off day.
Mourinho must realise that he needs Costa and Courtois, but he also needs Lukaku and Cech. All four could play a key role in the club's success next season.
Chelsea fans: Do you agree? Have your say below!