The veteran Argentine defender is a much-loved figure at Manchester City and has already endeared himself to West Ham fans with his committed performances since joining on a free transfer in the summer.
The intensity of training on their first day together was noticeably higher but the session was also notable for something else... Zabaleta apparently sporting a Manchester City scarf.
Around 48 seconds into the video posted on West Ham's Twitter feed, the 32-year-old can be seen taking part in a passing drill alongside the likes of Mark Noble, Andy Carroll and Manuel Lanzini under the guidance of Pearce and Irvine and he is clearly wearing a white and light blue striped scarf as a snood in the cold conditions.
✅ Moyes— West Ham United (@WestHamUtd) November 13, 2017
✅ Irvine pic.twitter.com/Ztfmr0A9RM
Already a cult hero at the Etihad, it is sure to cement Zabaleta in the hearts of Cityzens.
Some Hammers fans will undoubtedly find it funny while others may think it somewhat peculiar.
One thing is for sure nobody will be able to question Zabaleta's commitment to the West Ham cause come Sunday evening when they take on Watford in a crucial game at Vicarage Road.