In order to remain competitive, Chelsea manager Jose Mourinho will be keen to strengthen his squad in the summer.
A couple of players are expected to arrive - in particular a new striker - while several of the team's old guard could be released.
But which five players must Mourinho do his utmost to keep at the club?
Jose Mourinho holds Oscar in high regard, like everyone else at Stamford Bridge.
The 22-year-old Brazil international continues to get better and better, and is on course to become one of the Premier League's standout players.
Some will argue that he's at that level already, but it's clear that the best is yet to come from this gifted South American playmaker.
It's no surprise that some of Europe's richest clubs, such as Paris Saint-Germain, have been linked with a move for Belgium international Eden Hazard.
But there's virtually no chance that Mourinho will allow the 23-year-old winger to leave Stamford Bridge.
Chelsea's manager said today that Hazard, who cost the Blues £32m in 2012, could become one of the world's best players.
It appears to be a question of 'when' rather than 'if' he will reach that level.
Ramires often goes under the radar at Chelsea, but the indefatigable midfielder is a vital player in Mourinho's system.
The 26-year-old works tirelessly for the Blues. Such work rate is hard to come by in football, and Mourinho will not be prepared to even entertain the idea of him leaving Stamford Bridge.
Other midfielders may arrive at the club in the summer, but Ramires has no concerns over his place in the first team.
Branislav Ivanovic might be a centre-back by trade, but the Serbia international has developed into one of the Premier League's best right-backs.
The 29-year-old bombs up and down the right-hand touchline but never, ever neglects his defensive duties.
Fiercely committed, Ivanovic has been a superb signing since arriving at Stamford Bridge from Lokomotiv Moscow in 2008.
Mourinho risks losing the future best goalkeeper in world football unless he makes a terribly difficult choice this summer.
Thibaut Courtois, 21, is already one of Europe's finest goalkeepers - his displays at Atletico Madrid have been nothing short of sublime over the last two-and-a-half-season.
But unless Mourinho uses him from the start of the 2014/15 season, there's a good chance that the Belgium international will decide to leave the Blues and sign for another top club on a permanent deal.
Will Mourinho display his ruthless streak and tell Petr Cech that he is no longer Chelsea's first-choice 'keeper? For the good of the club, he will need to.