Romelu Lukaku and Tiemoue Bakayoko top the wishlist… the transfer business Chelsea will look to complete this summer

It should be a very busy summer for Chelsea and the first job has to be keeping some of the key players.

Eden Hazard and Thibaut Courtois have given little indication lately that they are tempted by Real Madrid but the speculation will continue until long-term contracts are signed. Chelsea cannot afford to lose either.

Hazard is one of the most exciting attackers in Europe, while Courtois is one of the finest keepers and can fill the position for the next decade. The club will have to increase their salaries to £300,000 a week and over £150,000 a week respectively.

The most significant outlay is expected to be on re-signing Romelu Lukaku. The Belgium striker is the clear first choice to improve the frontline, with interest in Alvaro Morata having cooled. He will not be cheap. Everton bought him from Chelsea for £28million in 2014 but are demanding £100m for his now.

A striker will be one of up to six signings that Chelsea plan to make, including at least one wing back, a centre-half, a central midfielder and a back-up goalkeeper. Southampton defenders Van Dijk, Cedric Soares and Ryan Bertrand are all on the wish-list.

Coach Antonio Conte has earmarked Monaco’s Tiemoue Bakayoko as N’Golo Kante’s midfield partner and they are favourites to buy the France international for in excess of £40m.

But they will also consider more attacking players, such as Arsenal’s Sanchez, to improve competition.

The future of Diego Costa - despite the announcement regarding Atletico Madrid’s transfer ban - is still in doubt. Goalkeeper Asmir Begovic has joined Bournemouth, who also want Nathan Ake, for £10m.

John Terry’s contract has expired, while Michy Batshuayi and young talent such as Ruben Loftus-Cheek and Tammy Abraham are set to be loaned out.