Antonio Conte's first transfer window as Chelsea manager was a difficult one for the Italian, with the Blues boss struggling to bring in his first-choice defensive targets.
Chelsea failed in their attempts to bring in Leonardo Bonucci, Kalidou Koulibaly and England defender John Stones, meaning they had to turn to alternative options as the transfer deadline loomed.
Luckily for Conte, the club had managed to complete the key signings of Michy Batshuayi and N'Golo Kante long before deadline day. However, it didn't help the west London club in solving their defensive crisis.
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The Chelsea boss was sweating on some late business going through, with the Blues severely down on numbers at the back, but managed to pull off two defensive swoops in the final hours of the window.
Marcos Alonso's £24 million arrival from Fiorentina came as welcome relief, while the shock return of David Luiz, from PSG, was an added bonus for Conte.
However, despite the duo costing Chelsea £58 million, Blues fans were not reassured about their issues at the back. Luiz's defending has come under criticism in the past, and both Luiz and Alonso came under fire on Tuesday night, as Chelsea headed to Premier League champions Leicester City in the EFL Cup.
While Blues fans were expressing their delight at some of the Brazilian's passing in the cup fixture, they were quick to troll Luiz's defending, on Twitter.
But it wasn't just Luiz who was coming under scrutiny on Twitter, with former Sunderland loanee, Alonso, also on the wrong end of criticism.
Although Alonso's overall performance received mixed reviews, it could be argued that neither of Conte's summer arrivals covered themselves in glory overall, particularly in the first half, as Shinji Okazaki scored twice to give the hosts a clear lead.
Luckily for Conte, though, a late first-half strike from Gary Cahill and Cesar Azpilicueta equaliser were enough to send the tie to extra time.
Will David Luiz prove to be a liability for Antonio Conte at the back for Chelsea? Have your say in the comment box below.