As an undisputed right-back, Cesar Azipilicueta has held major responsibilities in Chelsea and it appears that no player has been able to compete with him since he came into Stamford Bridge.
Often times, he played as a left back under several managers before switching to the right.
Under former manager Antonio Conte, he played as a joint 3 back-line alongside David Luiz and Garry Cahill.
He appeared to be the shortest at the back but his intelligence showed how much he could compete with others, irrespective of his height.
Zappacosta eventually came in, not to replace Azpilicueta, but challenge Victor Moses.
Recently, Maurizio Sarri clearly stated that Moses will play as an attacker, so it means Zappacosta cannot challenge Moses or compete as a right-back with Azpilicueta because of his inconsistencies.
More reason why Chelsea will need to look out for Ricardo Pereira. The former FC Porto defender could be a potential right back that could compete with the 29-year-old captain.
His intelligence can as well be matched with the Spanish right back. His tackles, pace and quick feet makes him remarkable.
Irrespective of his height, he was privileged to be converted as a fullback under Paola Fonseca while he was in FC Porto.
In 2013 final, not only was he among the players that won the domestic league cup for the first time, but he also scored against Benfica.
He joined coach Favre’s men on loan who was among the players that saw Nice qualify for the Champions League last season, even though they were knocked out of the qualifying round as he was in that same year voted the best fullback by the international centre for sports studies and top 10 right backs in Europe.
The 24-year-old right back played with Portugal in Russia, right from the group stage to the knockout.
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He probably looks like a player who wants to catch the eyes of bigger clubs in the Premier League before joining Leicester City as a right back for €25 million during the summer transfer window.
In recent years, Chelsea have always had good transfer terms with Leicester City when the blues snatched N’Golo Kante and Danny Drinkwater.
The Blues are never short of attackers but with the influence of an attacking minded defender, the right-wing can be as effective as the pair between Hazard and Alonso. Sarri should start considering a potential right back like Ricardo Pereira