Marko Arnautovic insists West Ham "feels like home" and has ruled out a move away from the club in January.
Arnautovic has attracted interest from two Chinese clubs, believed to be Shanghai SIPG and Guangzhou Evergrande, and Sky sources understand West Ham rejected a £35m bid for him earlier in the transfer window.
The Hammers are believed to have told Arnautovic he can leave the club this month if they receive an offer worth £50m.
However, the Austria international insists he is fully committed to the Hammers until the end of the season.
"I guess it's no secret that there has been an offer for me and I have to admit that the offer was a very tempting one for me and my family," Arnautovic wrote on Instagram.
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"I've given 100 per cent to my club duties but I have also needed some time to talk to my club, my wife and the rest of my family.
"I have now decided to put a stop to all the writings and speculation. I'm a professional footballer and the only thing I know in life is to play football.
"It's clear that London and West Ham United feels like home for me and I hope the West Ham fans have always seen that.
"The club has pointed my career in the right direction since I joined and therefore I want to put the offers aside, help the club climb as high as possible in the table and try to win the [FA] Cup.
"Let's focus on the rest of this season together and let them bubbles fly."
West Ham are in talks to sign Celta Vigo striker Maxi Gomez, but the move is understood to be independent of Arnautovic's future.