Chelsea have a big summer coming up with the futures of several players still in the balance. Thomas Tuchel is trying to make the Blues a Premier League title contender again and will be looking for reinforcements as well.Declan Rice, Jules Kounde, and Aurélien Tchouaméni are reportedly the club’s top targets, but they are unlikely to be signed without current players making way. The Champions League winners have a huge squad, and trimming it is one of the main objectives for the club after the season ends.While the Blues look at letting go of some 'deadwood', a few top players could depart as well. Here are five players who could leave Chelsea in the summer:#5 Antonio RudigerRudiger is heading towards the end of his contract, and the German will become a free agent in the summer. He is keen to stay and has repeatedly admitted that he wants to keep going at Stamford Bridge."I feel great here, I have always said it. I think the way I play you can see that I'm happy here. But there are also other people who have to make decisions. Does it keep getting better and better for me at Chelsea? Yes. We had never won this trophy (FIFA Club World Cup) in Chelsea's history before. I'm very delighted that we didn't give up, that we did our thing. We tried everything and won," said the defender.However, things are not as simple as the Blues are yet to offer him when he has demanded.Chelsea FC@ChelseaFC#FridayFeeling with @ToniRuediger! 8:20 PM · Oct 29, 202112899777#FridayFeeling with @ToniRuediger! 😁 https://t.co/a1SWVjIcGlReports suggest the defender has asked for a contract over £200k a week, but the London side are unwilling to break the bank right now.Things seem to be edging closer towards a new contract, but if there is no agreement soon, Rudiger could be on his way out, with Real Madrid and Bayern Munich leading the chase.#4 Cesar Azpilicueta (Chelsea captain)Cesas Azpilicueta in action v Lille OSC: Round Of Sixteen Leg One - UEFA Champions LeagueAnother player set to become a free agent is club captain Cesar Azpilicueta. The Spaniard has won it all at Stamford Bridge and is the only player in the club's history to do so.Reports suggest the versatile defender is looking to sign a multi-year contract, but the Blues have offered him a single-year deal.Chelsea FC@ChelseaFCIt's official, @CesarAzpi has now won it all! A thread. 11:31 PM · Feb 14, 2022385324590It's official, @CesarAzpi has now won it all! 😁A thread. ⤵️ https://t.co/b5VhDJ9Yk3The club has an unwritten rule of offering players over 30 a single-season contract but will have to break it to keep their captain.Barcelona have reportedly offered him a multi-year contract and are willing to match his wages at Stamford Bridge.