It’s unclear whether Allardyce will still be the West Ham boss at the start of next season, with Sinclair suggesting he finds it difficult to defend the manager in the same way that he could during the first half of the season.
“Has he? At the beginning of the season up until the turn of the year I thought come on fans - get on side because the team were doing brilliant,” said Sinclair.
“You put a hole in that confidence and all of a sudden there are a few people who doubt the gaffer and you lose that momentum.”
West Ham suffered another defeat in their last game against Leicester City, with the side having won just one game since they defeated Bristol City in the FA Cup earlier in the season.
If Allardyce has aspirations to manage West Ham for longer than this season, he needs to find a way to get the confidence back into his team and to create some momentum.
The boss is always going to have his critics, but he can keep the group as small as possible while the side are playing well and winning games.
Sinclair is a great example of someone who has always stuck up for Allardyce, but with doubts creeping into the confidence surrounding him as manager, an impressive win against Stoke this weekend can help to reinforce that confidence.