The England defender looks to become one of the fall players of Jose Mourinho’s summer recruitment plan at Old Trafford, with reports claiming that he will make way for £30.7million to swoop Victor Lindeof.
And the Daily Telegraph reported that Smalling will be made obtainable for just £15million after being viewed surplus to requirements by boss Mourinho.
The paper suggest Mourinho has serious unstated doubt that Smalling is good enough for the club, while the United boss has also questioned the 27-year-old mindset on several occasions during the season.
The England defender missed six weeks of the season due to a broken toe in a Europa League win over Fenerbahce at Old Trafford in October that resulted in Mourinho questioning his desire to play through the pain barrier.
Smalling has recently changed agents in a bid to help him get the best move and West Ham, West Brom and Everton are three of the clubs monitoring him.
Reports have also indicated that West Ham are leading the race for the Greenwich-born star, who joined United in a £12million deal from Fulham back in January 2010.
However, Everton also believe they have a good chance of signing the defender, who is settled in the north-west and wouldn’t have to leave the area if he were to join Ronald Koeman’s side.
Smalling has made 243 appearances during his six-and-a-half-year stay at Old Trafford, but has fallen way down Mourinho’s pecking order.
The defender was voted Players’ Player of the Year for United at the end of former manager Louis van Gaal’s last season in charge. But Mourinho wants to partner Eric Bailly with Lindelof, while Marcos Rojo and Phil Jones are the preferred back-up options, leaving Smalling as an outcast.