Some younger players have also been left behind and are likely to feature in the friendlies taking place in Britain and Ireland. Those competing at the Under-20 World Cup have been granted a break, namely Sam Johnstone, Guillermo Varela, Tom Thorpe, Larnell Cole and Angelo Henriquez.
"Larnell Cole was given extra time off," confirmed the Reds boss. "He was playing in the European tournaments this summer. He's only just reporting back for training now. The people tell me he's an exciting prospect and I'm looking forward to seeing more of him in the coming months.
"At the moment, we want to change one or two things around. I just need a bit of time to do that. I've chosen not to bring them [some of the more established fringe members of the squad such as Bebe and Federico Macheda] on the tour. I felt as if I wanted to give some other players an opportunity so I've left them behind."
"I'm really excited but more excited about the players I'm working with. They've lifted me. The biggest thing is the professionalism. It's second to none. Also their commitment to be winners. I see it in training."