West Ham United's superb start to the season has seen them pick up 18 points from the first 11 games, winning five of those in an impressive period for manager Sam Allardyce.
A large reason for their upturn in results is the backing Allardyce received in the transfer market this summer. Despite a 13th place finish last season and calls for 'Big Sam' to go, he spent heavily in the summer, snapping up the likes of Alex Song, Diafra Sakho and Enner Valencia.
Those three have made instant impacts at Upton Park, but Mauro Zarate has yet to really get going in East London.
The 27-year-old was snapped up on a free transfer from Velez Sarsfield this summer, and whilst he scored against Crystal Palace earlier this season, he hasn't featured for over a month now.
Co-chairman David Gold told fans that there is nothing suspicious surrounding his absence, simply that the Chilean is currently out injured.
However, his agent and brother Sergio has revealed that Zarate could leave Upton Park in January, with a return to Serie A on the cards.
Zarate spent five years with Lazio, with one season on loan at Inter Milan included. With those two Italian sides, Zarate bagged 37 goals in just over 150 games, before returning to Argentina with his first club Velez.
Now, having lost Alessio Cerci and Fabio Quagliarella in the summer, speculation in Italy suggests that Zarate will make a swift return to Serie A as Torino line him up for a January move.
With his prolonged absence, it hasn't quite worked out for Zarate at West Ham, but in Allardyce's new 4-3-1-2 system, he may be a good fit to play behind the strikers - though Stewart Downing's form could make that difficult.
It may be too soon to give up on Zarate, but it he does really want to move back to Italy, then Allardyce is better off letting him go.