Sergio Aguero: Emiliano Martinez can Win Games For You.

Sergio Aguero has backed Chelsea’s summer signing Emiliano Martinez to become an influential figure at Stamford Bridge, despite warning that the Argentine goalkeeper may need time to adapt to his new defensive unit.

Martinez joined Chelsea from Aston Villa in August on a three-year contract after establishing himself as one of the world’s leading goalkeepers. The 33-year-old arrives with an impressive résumé that includes the 2022 FIFA World Cup, two Copa America titles and two Yashin Trophy awards.

Speaking about Chelsea’s new goalkeeper, Aguero praised the transfer but highlighted the defensive problems that have made Martinez’s immediate task more difficult.

“Emiliano Martínez is an excellent signing, but Chelsea have conceded a lot of goals.”

Aguero believes building an understanding with Chelsea’s defenders will be crucial. Martinez must adapt to a new defensive structure and develop communication with teammates before he can consistently have the impact expected of him.

Chelsea’s defensive struggles have been significant. The Blues entered the 2026/27 campaign without a Premier League clean sheet since January, while conceding at least twice in each of their opening four league matches.

However, Aguero remains confident that Martinez’s ability to produce decisive saves can change matches in Chelsea’s favour.

“He can win matches for you,” Aguero said, emphasizing the goalkeeper’s capacity to make game-changing interventions.

Aguero also praised another Argentine arrival, Valentin Barco. The versatile 22-year-old joined Chelsea from Strasbourg on a contract running until 2033 after an impressive spell in France, where he contributed 12 goals in 43 appearances last season.

According to Aguero, Barco possesses the talent and energy to succeed at Chelsea once he adjusts to the intensity of English football.

With Martinez providing experience and Barco offering youth and versatility, Chelsea have added two Argentine internationals who could play important roles under Xabi Alonso. For Aguero, however, Martinez could ultimately prove to be the signing capable of making the biggest difference.