Martinez admitted that there is a lack of confidence running through his side and that he is facing a tough period at the club.
He said, “I thought the only positive was the way we started – we were trying to find momentum but conceding a simple goal affected us too much.
“We had chances today but there is a lack of confidence. It is a tough period but we still want to find real success this season.
“Kevin [Mirallas] was feeling a little bit sore at half-time and we needed everyone to be 100% in order to be dynamic.”