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To quote Chelsea manager Jose Mourinho, per the Telegraph: "In almost every position we have the present and also the future."
Rather than let Benfica sell Nemanja Matic to another big European team, Chelsea re-signed the former Chelsea player for £21 million, per Sky Sports.
While it is grovelling, the arrival of Matic, a tough and technically gifted midfielder who can play in a variety of formations, gives Mourinho more tactical flexibility.
The signing of Kurt Zouma, a world-class centre-back prospect, from Saint-Etienne for £12.5 million, per ESPN, is brilliant.
"(Zouma is) a player with big potential, physically ready," Mourinho said, per the Telegraph. "One thing is to be physically ready, another thing is to be tactically ready. Well done Chelsea."
The "well done" Chelsea part is the telltale sign that Zouma was a Mourinho recommendation.
To not stunt his development, Chelsea have loaned Zouma back to Saint-Etienne.
Mohamed Salah, an £11 million signing from Basel, per Alex Richards at the Mirror, is the riskiest of the three signings.
£11 million for a player who may end up being an occasional starter/impact sub is not an economically efficient deal.
The only winner of this deal is Eredivisie club Vitesse.
As soon as Salah, the reigning Swiss Football League player of the year, starts voicing his unhappiness at not being a regular starter, he will probably head to Vitesse on a loan.
There are currently four Chelsea loanees on Vitesse's books: Lucas Piazon, Patrick van Aanholt, Christian Atsu and Cristian Cuevas.
That said, it has been a winning transfer window for Chelsea, which was accentuated by the sale of benchwarmer Kevin de Bruyne to Wolfsburg, which netted the Blues approximately a £10 million profit, per the Independent.