Despite his friendship with Lionel Messi, some Barcelona execs believe that the Uruguayan's stint as their No.9 could come to an end soon.

Luis Suárez worrying form is starting to create controversy at Camp Nou, and according to reports by the Spanish media, his time as Lionel Messi's partner in crime could end with the season.

Spanish outlet Don Balón has revealed that the team has lined up five potential replacements to take over as the team's No. 9. The main facts behind this decision are none other than the player's age and his shaky form throughout the year, which has seen the Uruguayan's numbers taking a dip.

Considering their recent business with Liverpool, the Spanish outlet revealed that the first transfer target would be none other than Roberto Firmino, who has been highly praised by Philippe Coutinho after their time together at Anfield. The next footballer on the list is Harry Kane, although his high wage would complicate all negotiations.

The third man on the list is Timo Werner, who was also linked to Real Madrid during both the winter and summer transfer windows. The last names on this list would be those of Lille's Nicolas Pépé and Krzysztof Piatek. Lille's footballer is being followed closely by Barcelona's Sporting Director Eric Abidal, mainly due to his connections to Ligue 1 teams.

There are two issues for Barcelona to solve in any potential transfer involving Suárez. First, the player would still be interested in playing for a top-caliber club that can also afford to pay his high wage. Then, Lionel Messi's close relationship with the striker could be a major roadblock for this move, since the Argentine would not sanction one of his friends to leave the club.

One thing's for sure: if Luis Suárez is not able to recover his goalscoring form, these rumors will increase with each passing week without goals. Only time will tell if any of these footballers end up joining Los Blaugranas.