Chelsea have undergone a dreadful first half of the 2015/16 campaign. They currently sit 14th in the Premier League, failed to defend their Capital One Cup title and for the second time sacked Jose Mourinho - the most successful manager in their history.
Whether it's a coincidence or not, this season's hell has taken place after a relatively quiet summer transfer window. The Blues missed out on John Stones, took a strange gamble on Radamel Falcao and signed Pedro in a last-minute bid for a big name signing.
It's obvious that Chelsea are in need of reinforcements. A squad overhaul may be a little extreme, particularly considering their improved form since the departure of Mourinho - so here are five players they could sign to revamp their squad.
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Chelsea rarely miss out on a player they chase as hard as they did in the summer of 2015, when they failed to sign Everton centre-back Stones despite entering bids well above £30 million.
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The following six months proved why then-manager Mourinho so strongly pursued Stones, with the Premier League champions conceding 29 league goals to date - the joint-sixth worst defensive record in the league.
There is little doubt Chelsea would have benefited from the extra option Stones would have provided, especially considering the dire form shown by Branislav Ivanovic, John Terry and Gary Cahill.
Stones is capable of succeeding Terry in the heart of the Blues' defence, and it should therefore be made a priority to lure the England international to Stamford Bridge and sure up the club's leaky defence.
Another area where Chelsea have struggled this season is their strikers, with Diego Costa, Loic Remy and Falcao registering just 12 goals between them in all competitions this season.
In comparison, Atletico Madrid frontman Griezmann has 14 goals in La Liga and the Champions League. Under the guidance of Diego Simeone - a man rumoured to be at the top of Chelsea’s wish list this summer - the Frenchman has shouldered the responsibility of spearheading a strike force featuring the out-of-form Fernando Torres and summer signing Jackson Martinez.
The France international's ability to work in tight spaces and score using his pace, skill and movement makes him the perfect candidate to rival Costa as the number one striker at Stamford Bridge.
Another striking option for the Blues to consider is former player Romelu Lukaku. After being sold by Mourinho to Everton at the beginning of the 2014/15 season, the Belgian has scored 25 league goals in 56 appearances, 15 of those coming this season.
Lukaku’s tendency to spend large amounts of time in the box is something Chelsea have lacked this season. Far too often the Blues' strikers have been absent in the 18-yard area, meaning the likes of Cesc Fabregas, Eden Hazard, Oscar and Willian have struggled to pick out the killer ball.
A striker blessed with a fearsome combination of strength, pace and movement, the Belgium international would, like the aforementioned Griezmann, provide solid competition for, or even partner, Costa in a Blues attack desperate for change.
With reports suggesting talisman Hazard is unhappy at Stamford Bridge, the Blues will potentially be on the lookout for a new, creative midfielder next summer - and one player who fits the billing is German and Bayern Munich star Mario Gotze.
The Germany international has struggled to make an impact at the Allianz Arena this season, making just four starts for the Bundesliga champions. Rumours circulated that a January move to Jurgen Klopp's Liverpool could be on the cards, though Gotze has rejected such claims.
What's evident is the 23-year-old's future is uncertain and could lie away from the Bavarians, and if this is the case, Chelsea should look to swoop.
Gotze's versatility would be of great benefit to the west Londoners given he can play anywhere across the attacking line. The World Cup winner would provide solid competition for current playmakers Oscar and Fabregas, both of whom have struggled this season.
Amongst the various clubs interested in Hazard is Real Madrid, which could pave the way for a transfer involving Gareth Bale.
Despite showing glimpses of his brilliance since joining Los Blancos in 2013, a particular example his spectacular solo goal against Barcelona in the 2014 Copa Del Rey final, Bale has faced criticism and struggled to secure a regular spot with the likes of Cristiano Ronaldo, Isco and James Rodriguez to compete with.
Returning to the Premier League, where he won the PFA Player of the Year with Tottenham Hotspur prior to his move, could be beneficial for the Wales international. Whilst Chelsea have considerable quality going forward, Bale would be a marquee signing and command consistent playing time at the Bridge.
His pace and eye for goal would prove a much-needed threat in a Chelsea attack lacking penetration and incision this season.
Bale has, however, insisted he is happy in the Spanish capital and rediscovered form recently, scoring a hat-trick against Deportivo last weekend. A world-record transfer fee would likely be required unless the Welshman was involved in a deal including Hazard.
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