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Barcelona are among the most successful clubs in Europe and were crowned as the Champions of Europe on five different occasions, most recently in 2015.
However, they performed overwhelming poor in the last three editions of the competition and failed to go beyond the quarter-final stages in any of those. Their bitter rivals completely dominated during that period and won the competitions in all of the previous three occasions.
Nevertheless, Real Madrid are struggling this season and the Blaugrana can use this as the opportunity to take back their European crown.
Right on this note, here is a list of five players who if brought to the Camp Nou this January could help Barcelona win the Champions League.
#5 Ruben Neves
Sergio Busquets is one of the world's best holding midfielders for years now - proving himself to be an integral part of Barcelona's most successful periods in recent history. However, the Spanish defender is now 30 years old and his level will only decline from now on.
Ruben Neves is one of the best defensive midfielders in the English Premier League and can do a good job of replacing the Barcelona legend.
Ruben Neves primarily plays as a defensive midfielder, but he is best known for his passes and the ability to break the opponent's attack with his smart understanding of the game. He is quite mature for his age and will also bring some leadership on the pitch for the Blaugrana (he is the youngest player to start as a captain in a Champions League game for Porto).
Although his abilities best suit the defensive side of the game, he is not afraid of going forward to help and contributed one goal and one assist in the Premier League this season.
With his best years yet to come, he will prove to be a good signing for Barcelona if they decide to go after him in January.
#4 Lautaro Martinez
Luis Suarez scored seven goals this season and is just one goal behind Cristhian Stuani in the race for the La Liga Golden Shoe. However, with Paco Alcazar currently out on loan, Barcelona lacks strength on the bench and no other striker in the team is capable of filling the shoes of the Uruguayan in his absence.
Inter Milan striker Lutaro Martinez is one of the best young strikers in the world right now and would be the perfect backup option for Luis Suarez- with the potential of replacing the Uruguayan in the future.
Powerful and determined, Martinez is the kind of player who can run into a brick wall for the manager. His overall gameplay draws comparisons to Sergio Aguero with the Argentine media tipping him to enjoy the same success as the Manchester City striker.
The 21-year-old scored 27 goals in 63 appearances and bagged six assists during his career. The player will bring much-needed depth to the Spanish side and increase the chances of Barcelona winning the Champions League this season.
#3 Alex Sandro
Jordi Alba was linked with Manchester United in the past few weeks and Barcelona needs to look for a new left-back if the Spaniard decides to leave the Bernabeu. Juventus' Alex Sandro is currently among the best left-backs in the world and would be a great addition for the Blaugrana.
The 27-year-old Brazillian is an attacking fullback who is a threat going forward and unlike many attacking fullbacks, he is defensively sound as well. He played 89 league games for Juventus thus far, scoring nine times.
He won three Serie A titles with the Italian giants and was a part of the Serie A Team of the year 2016-2017.
With Real Madrid's Marcelo being linked with the move to Juventus, Sandro may find himself amongst the fringes and moving to Barcelona could benefit all the parties. However, Real Madrid have also shown their interest towards him in the recent weeks and the Blaugrana needs to act quicker than their rivals in order to bring the Brazillian to Camp Nou.
#2 Kalidou Koulibaly
Barcelona started the season in a fine form and are currently at the top of the LaLiga standings with 21 points in the opening 10 games. However, their defence is not at their usual best and they conceded 12 goals during that period of time, which is only the ninth-best defensive record in the league this season.
Quick, strong and an absolute monster in the air, Kalidou Koulibaly is one of the best defenders in the Serie A and would significantly improve the Blaugrana's defence.
He would bring composure to the Barcelona's backline that they are lacking at the moment and would provide added insurance for goalkeeper Marc Andre Ter Stegen. He is comfortable with the ball at his feet and has an excellent passing range too.
He completed 666 passes with an impressive accuracy rate of 90.4% this season. With 14 interceptions and 17 tackles completed in the league alone, he is the team's one of the most consistent and influential performers.
#1 Kylian Mbappe
Ever since the departure of Neymar, Barcelona became over-reliant on Lionel Messi and the Blaugrana always depend on their Argentine superstar whenever the team is in trouble. However, signing Kylian Mbappe could change the situation and the Frenchmen can lower the burden on Lionel Messi.
The 'Golden Boy' of 2017, Kylian Mbappe made his debut in 2015 at the tender age of 16 but he got his breakthrough only in the 2016-2017 season. He was one of Monaco's star players during that season as they clinched the Ligue 1 title right under the noses of PSG.
AS Monaco also reached the semi-finals of the Champions League in the 2016-2017 season and Mbappe played a vital role in the team, scoring six goals in their European campaign. He finished the 2016-2017 season with 26 goals in all competitions.
His impressive performances at AS Monaco impressed PSG and they initially signed him on-loan (with a provision in place to sign him permanently in 2018) in the summer of 2017. He was the part of FIFPro World XI: 2018 and scored 13 goals and assisted further seven during the 2017-2018 season.
He started brilliantly this season as well and bagged 10 goals and assisted further three in the opening seven games.
