Manchester United are interested in signing West Ham forward Marko Arnautovic, according to Sky sources.
According to reports, the Hammers have no intention of the selling the 29-year-old and value him at £50m.
Arnautovic joined West Ham from Stoke for a club-record £24m fee last summer and netted 11 goals during his debut season with the club.
The Austria international, who also contributed six assists during the 2017/18 campaign, has four years left to run on his contract at the London Stadium.
Arnautovic previously worked with United manager Jose Mourinho during their time together at Inter Milan in 2009.
He made only three appearances for Inter during an unsuccessful loan spell at the San Siro from FC Twente and subsequently joined Werder Bremen in the summer of 2010.
Meanwhile, United remain in talks to sign Porto full-back Diogo Dalot and Shakhtar Donetsk midfielder Fred as they look strengthen their squad ahead of next season.
Sky sources understand West Ham are in talks to sign Genoa defender Armando Izzo and are also interested in Barcelona defender Marlon Santos with new manager Manuel Pellegrini aiming to sign up to five players this summer.