Chelsea have made significant additions in the transfer market this summer, strengthening in defence, midfield and attack so far with multiple additions.
Left-back Ben Chilwell joined from Leicester City for £50m, experienced centre-back Thiago Silva signed a one-year deal with the club after leaving PSG, Timo Werner made a £47.7m switch from RB Leipzig and they forked out £36m for Hakim Ziyech.
However, the spending seems unlikely to end there, with Blues boss Frank Lampard looking to find a replacement for out-of-favour goalkeeper Kepa Arrizabalaga.
The Spaniard came under fire last season after making a number of high profile errors and Chelsea have been heavily linked with a number of potential replacements.
Here, Daily Star Sport takes a look at four potential options.
AC Milan stopper Donnarumma has been linked with a switch to Stamford Bridge, with his current deal at the San Siro due to expire next summer.
Milan are said to value the 21-year-old at around £50m but if he puts pen to paper on a new deal then his valuation will rise significantly and Chelsea will need to turn their attentions elsewhere.
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Chelsea's new strongest possible line up after making five signings this season
Mendy is a more low-profile option than Donnarumma but Chelsea have reportedly had a bid rejected by Rennes for the Senegal international.
Mendy helped Rennes qualify for the Champions League for the first time in their history, keeping nine clean sheets and conceded just 19 goals in 24 Ligue 1 appearances.
The Blues could return with an improved offer, with Rennes demanding £45m for the 28-year-old.
Chelsea’s goalkeeper target Mike Maignan available for just £27m
Chelsea have also been linked with a £27m move for Lille goalkeeper Maignan.
The 25-year-old played every league game for the club last season and reports from France claim Chelsea are in talks with Lille about signing him.
It has also been claimed that Lille are already planning for a future without Maignan, with experienced keeper Stephane Ruffier on their radar.
The Atletico Madrid vice-captain would be an excellent signing and there has been plenty of talk about a potential switch to Stamford Bridge, with Oblak, Atletico boss Diego Simeone and club president Enrique Cerezo addressing the rumours.
Oblak has a reported £110m release clause and the Slovenian international did admit he was considering his future before the end of last season's Champions League campaign.
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