Before this week, it had been a fairly quiet summer at Chelsea in terms of transfers.
The Blues have had to sit and watch Manchester United, Manchester City, Arsenal and Liverpool make early moves while their incoming manager, Antonio Conte, was busy at Euro 2016 with Italy.
But, suddenly, the 2014/15 Premier League champions have sprung into action.
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Today, they announced the signing of Michy Batshuayi for £33 million and the young Belgian is set to be joined by another arrival imminently.
That’s because the Mirror are reporting that Chelsea have won the race to sign Napoli defender Kalidou Koulibaly for £30 million.
The Senegalese central defender has failed to agree a new contract at the Serie A club and Antonio Conte - who obviously knows him well from his time in Italy - has moved quickly the sign him.
The report also states that Chelsea beat London rivals Arsenal to the signing with the Gunners were keen to capture Koulibaly.
It seems the 25-year-old will now arrive at Stamford Bridge and join John Terry, Gary Cahill and Kurt Zouma - when he recovers from his injury - vying for centre-back role.
However, Conte could opt to field three central defenders like he has done with Italy at Euro 2016 next season in the Premier League, meaning the Koulibaly signing makes even more sense.
The club know they need to continue making additions to the squad that finished tenth last season if they are to keep up with the two Manchester clubs in this transfer window.