Coates's support for Pulis has not been shaken.
He told The Sentinel: "Tony has done remarkably well for this football club, but every club in the Premier League has a lean spell at some point.
"I understand we are having a bad time, and if you don't get results and don't play well then managers get criticised, but there has to be some balance.
"We have had a very good period at this club and you have to look at the whole rather than a bad patch.
"I didn't think we played badly at Newcastle at Sunday; we deserved something from that game."