Jol believes Southampton are one of the sides that will around the dropzone come the end of the season, but will not be taking them for granted on Boxing Day.
"Sometimes they showed they can get the results and sometimes their weaknesses have been exploited, like we have," he said.
"That is the Barclays Premier League for you. It is unbelievably strong so you have to be strong in your organisation and you need your players that can make the difference.
"I feel we have got these players and hopefully they will be available. Even when they're not, we have got other players that can do the job, but the margin is a bit thin between being successful and not successful."