West Ham are tracking New York City FC star Valentin Castellanos.

The Argentine scored as New York City beat Portland Timbers on penalties to lift the MLS Cup last weekend, taking his tally for the season to 23 across all competitions.

West Ham are being linked with Castellanos ahead of the January market.

Castellanos is valued at around £15million, with Besiktas reported to have seen a bid turned down.

Several Championship clubs sounded New York out about a potential switch last summer but Castellanos' stock has since risen and he has been attracting interest from Spain.