"I must admit these players give us great options," the Slovakian told the club's official website.
"I remember Stewart from when I was playing against him a couple of years ago. I was at right-back and he was giving me a really hard time.
"He played really well that day so I am sure his crosses and speed will be very useful for our team.
"Charlie had a great individual season with Blackpool and I am really happy he is here.
"You could see his team depended a lot on him and he made a big difference. Jordan is still very young but he played for England so this says a lot about him."