Speaking to reporters, the 44-year-old said: "This is the worst game for us since we started the season. The toughest game and we need to be ready, otherwise it will be a bad day for us. If you analyse the results, they are there [at the bottom of the table] but in terms of performance, they are very good. They were leading against Liverpool, only lost 1-0 to Manchester City and they drew in the last game against Brighton.
"I was in the Championship with Southampton last season and I know how good they are. They are very brave, they want to keep the ball and for sure this will be a very difficult game for us and we need to be ready."