Virtually all of West Ham's summer signings have impressed this season, with great displays from the likes of Carl Jenkinson, Alex Song, Cheikhou Kouyate, Diafra Sakho and Enner Valencia.
Yet some fans may argue that Aaron Cresswell has been their best signing, with the left back adjusting to the Premier League seamlessly since his move from Ipswich Town.
The 24-year-old should be West Ham's first choice left back for years to come, but West Ham need to add depth and support behind him - something that manager Sam Allardyce tried to do in the summer.
Reports just months ago suggested that the Hammers were close to securing a £4m deal to sign Dnipro Dnipropetrovsk left back Ivan Strinic, but the move fell apart late in July.
Now though, we're approaching the January transfer window, and with the Hammers eyeing up a Champions League place, more spending could be granted next month, and adding another left back could be something for Allardyce to consider once again.
However, West Ham could now land Strinic for nothing - and here's why.
The Croatian international will be out of contract at the end of this season, meaning that the 27-year-old can sign a pre-contract agreement when the transfer window opens again.
If Allardyce was willing to fork out £4m to land him less than six months ago, then the prospect of adding him for free should be something that 'Big Sam' is interested in.
Napoli are also reportedly interested in adding Strinic for a knockdown price, but the instability of manager Rafael Benitez means that a switch to Italy could be risky - and West Ham are a club moving in the right direction.
Factor in that his former Croatia boss Slaven Bilic was a West Ham hero, and maybe the former Hammer could help persuade Strinic to make the move to Upton Park, keeping Cresswell on his toes in the process.