The summer arrival from RB Leipzig is currently recovering from a knee strain, but has struggled to make an impact in his first months in England.
However, The Times says United's coaching and recruitment are adamant about the potential and ability of the centre-forward.
Sesko was pushed hard from United's new data analyst, Mike Sansoni, who arrived from the Mercedes F1 team, where he had spent the past 11 years.
Sansoni is driving a data-dominated recruitment approach, with his analysis highlighing the running power of Sesko, which United's teams have lacked in terms of their attack.
Despite the modest start, United manager Ruben Amorim does believe Sesko, particularly given his attitude and application, can be a long-term option for the centre-forward position.