#3 Cesar Azpilicueta
Chelsea captain Cesar Azpilicueta has been a loyal servant of the club since joining them in an €8 million deal from Marseille in 2012. He has made 442 appearances for The Blues across competitions, scoring 14 and assisting 56 goals.
Azpilicueta is a leader on the pitch, marshalling his troops brilliantly. He captained the club to their second Champions League title last season. He has continued to perform at the top level despite getting shifted to centre-back in a three-man defence Thomas Tuchel has employed.
Now into his tenth year with Chelsea, the 32-year-old has won two Premier League, a Champions League, an FA Cup and a League cup title.
#2 Kyle Walker
Kyle Walker has been an integral part of Pep Guardiola's Manchester City since his arrival from Tottenham Hotspur in 2017. He has been a regular at City since then, helping them to three Premier League, an FA Cup and four League Cup titles.
Now into his fifth season with City, Walker is still one of the first names on the teamsheet. He has made 197 appearances for the club, scoring six and assisting 15 times.
Kyle Walker can play as a right-back, in a three-man defence and also as a wing-back. His versatility and tactical awareness make him one of the better full-backs in the game. Gareth Southgate has been used the 31-year-old as part of a back-three for England, where Walked has fitted in seamlessly.
#1 Jordi Alba
Barcelona's Jordi Alba is one of the best full-backs in the world above the age of 30.
The left-back flourished when Lionel Messi led the Barcelona attack, with Alba often being in the mix of things at the offensive end of the pitch. Despite his age, Alba hasn't slowed down or suffered a dent in his attacking abilities, even after Messi's departure to Paris Saint-Germain (PSG).
Alba joined Barcelona in 2012, and has since played 396 games for the club across competitions, scoring 22 goals and making 86 assists. He has won five La Liga titles, as many Spanish Cups and three Spanish Super Cups, along with a UEFA Champions League title in 2014-15.
Despite Barcelona's struggles in the ongoing season, Jordi Alba has continued to perform at the attacking front. In 11 appearances across competitions, he has already made five assists.