There is no doubt that the summer transfer window did not work out too well for the Blues.
With the additional pressure from Champions League games and expectations of not repeating the nightmare of the 2015-16 season, a good transfer window would have been of great use to the Stamford Bridge side.
The Premier League champions signed Willy Caballero, Antonio Rudiger, Alvaro Morata, Tiémoué Bakayoko, Danny Drinkwater and Davide Zappacosta.
However, they missed out on key targets such as Romelu Lukaku, Alex Sandro, Alex Oxlade-Chamberlain, to name just three and the sales of Asmir Begovic, Nathan Ake, Nemanja Matic and Diego Costa added more pressure on the club to perform in the transfer market.
Despite the opening day home defeat to Burnley and the shocking 3-0 defeat at AS Roma, Antonio Conte's men have been able to find a rhythm and are still on the hunt for four titles.
The only problem for Chelsea has been that they have not been able to provide good cover for Marcos Alonso.
The former Real Madrid man has already played more than 1200 minutes of Premier Leauge football and has started five Champions Leauge games for Chelsea.
Only Thibaut Courtois has played more minutes than Marcos Alonso this season for Chelsea, Cesar Azpilicueta is third.
The only cover for him is the Brazilian youngster Kennedy, who was about to leave in the summer on loan but did not in order to provide cover for the Spaniard.
Here we look at five players who could provide better cover for Marcos Alonso:
#5 Antonio Barreca (Torino)
The Italian came through the youth ranks at Torino and is slowly progressing towards making himself a regular starter for Siniša Mihajlovi?'s team. In his homeland Italy, he is considered to be one of the most promising youngsters and the future of Italian national football team.
Last season he had his breakthrough season with 28 Serie A appearances for Torino. He created 15 chances, the second most by any Torino defender, completed 29 take-ons and won 40 aerial duels.
He primarily plays as a left back and he has great physical and technical assets. His speed gives him the ability to initiate counter attacks as well as stop any potential threat of counter attacks.
Considering the fact that Chelsea mainly use counter-attacking football to score goals, he would fit in perfectly. The former Cagliari full back is blessed with outstanding crossing and short passing skills which very well complement his superb work rate.
If Chelsea signs him, he can provide great cover to Marcos Alonso as he is undoubtedly very talented. Roma, Inter Milan, and Tottenham Hotspurs have all been mooted as possible destinations for the youngster.
Also, Chelsea should be able to smoothly negotiate the transfer given that they have a history with Torino (Davide Zappacosta's transfer was hitch-free).