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Marko Arnautovic has become a key player at West Ham United, but there are uncertainties over his long-term future at the club.

The attacker's knee injury appears to be an ongoing problem, and now there have been murmurs in the press that he could be looking to move to a new club.

Arnautovic's brother and agent Daniel recently spoke to gianlucadimarzio.com, telling the website that his client is ready to take the next step forward in his career.

If playing at a higher level is what the striker desires, then West Ham could find themselves in a situation where they need to recruit a new attacker.

According to a recent report in the Daily Mail, the East London outfit are one of a handful of clubs keeping a close eye on Nantes striker Emiliano Sala.

The 28-year-old has been in fine form, scoring 13 goals in 14 appearances in all competitions.

The Playmaker FC squad decided to wind-up some unsuspecting Brazil fans at the Emirates on Saturday night. Watch the hilarious results in the video below...

Do you think Sala would be an adequate replacement for Arnautovic if the Austrian moved on?

Let us know by voting below.