It's hard to believe that Chelsea will win the league this season, but they definitely have a strong side to battle until the end. Chelsea finally have a manager that can make them one of the strongest teams in Europe, but the Chelsea board needs to realise that, and they must fulfill his wishes.
There are several positions in the squad which require reinforcements, they need to buy some world class players to strengthen the squad. These are Chelsea's weakest positions - centre-back, right-wing and centre-forward. Lets take a look at three players in these positions Chelsea should buy to become unstoppable.
#1 Daniele Rugani (Juventus)
Antonio Rudiger is by far The Blues' best defender, and David Luiz is very useful in this system because of his ability to play through balls to the attackers. However, Luiz's defensive skills are not at the highest level, and Chelsea should look for a new partner for Rudiger.
The defender who probably suits Sarriball the most is Daniele Rugani. This summer, Chelsea wanted to sign Rugani from Juventus but the player decided to stay. However, he has only one appearance in 8 Serie A matches so far this season.
Rugani's career at Juventus isn't going in the best way possible, so he could move away from Turin. London is a perfect destination because Sarri knows Rugani very well, he has coached him at Empoli. Rugani is very good on the ball, and his defensive skills are also very good. He and Rudiger could form a deadly partnership.
#2 Florian Thauvin (Marseille)
On the left side of his attack, Sarri loves to have a player that is capable of dictating the play and breaking the defensive lines. On the opposite side, Sarri uses a completely different player.
On the right wing, Sarri uses a runner. This player must be good at making the runs into space. Pedro is the perfect player for this role, and that is why he is thriving under Sarri, but Pedro is 31 years old, and he can't play at the highest level for many more years. Chelsea should find a replacement.
The Chelsea board should go for Florian Thauvin. The Frenchman is currently one of the best players in Ligue 1. Last season, he played the best football of his career. He is a very technically gifted player, and his technical skill-set is perfectly suited for Sarri's one-touch football.
He has already had one spell in England. In 2015 he signed for Newcastle, and it was a complete failure. He is 25 now, and this is the perfect time for a new chance at the highest level.
#3 Krzysztof Piątek (Genoa)
And finally, Chelsea need to find a man who will lead their attack in their future. Current options for this position include Olivier Giroud and Alvaro Morata.
Genoa's breakout star, Krzysztof Piątek should be considered as a long-term solution for Chelsea's striker problems. Piatek has scored 9 goals in 7 Serie A matches this season. Piatek has that striker's instinct to find a yard of space in the box, and he is also a real aerial threat.
The team structure deployed by Sarri is suited for a reference point, a one touch striker willing to make intelligent runs in the box. Piatek could definitely be that missing link for Chelsea.