As the football calendar races toward the January transfer window, Arsenal and Manchester United find themselves grappling with a critical weakness in their squads: the right-back position. Despite Arsenal’s strong start to the 2026/27 season and Manchester United’s struggles under Michael Carrick’s management, both clubs are actively eyeing reinforcements to bolster defensive stability. Porto’s 23-year-old right-back Alberto Costa is rapidly gaining attention as a prime candidate to fill this void.
Arsenal, continuing their momentum from last season, face ongoing concerns over Jurrien Timber’s injury-prone status. Timber has been sidelined five times since the beginning of last season, forcing manager Mikel Arteta to consider whether a more dependable option or at least a high-caliber backup is essential. Ben White has admirably provided cover, but with his contract running until 2028 and speculation about his future lingering, Arsenal’s right-back scenario remains uncertain. Whether White will cement himself as the regular starter remains to be seen, adding urgency to the quest for reinforcements.
Meanwhile, Manchester United’s situation is arguably more precarious. Diogo Dalot has held the right-back role with little competition, but inconsistent performances have raised doubts about his reliability. United’s lack of a credible alternative in this position has made the potential acquisition of Costa even more enticing.
Alberto Costa’s credentials are indisputable. Valued at €65 million, the Portuguese defender is a fixture in Porto’s lineup, having started 41 games since last season’s kickoff-only surpassed by four teammates. His defensive prowess is highlighted by a staggering 97 tackles attempted, with 61 successful-a team-high figure. Costa also ranks third in Porto’s defensive clearances, with 92, trailing only Jan Bednarek and former Arsenal defender Jakub Kiwior. His aerial ability is formidable, recording 54 headed clearances, again placing him just behind those two teammates. In one-on-one duels, Costa is highly competitive, winning 242 out of 465 attempts, narrowly edged by Victor Froholdt’s 506 attempts.
The statistical dominance Costa displays underlines why Arsenal and Manchester United are considering him a potential game-changer. His blend of defensive solidity, tackling efficiency, and aerial strength addresses the specific deficiencies both Premier League giants face at right-back. As January approaches, the race to secure Alberto Costa intensifies, promising a significant shake-up in one of the most pivotal defensive roles in English football.