West Ham United manager Slaven Bilic admits that some of his players will become unhappy if they are not seen as first-choice when the season kicks off.
The Irons boss has brought in Marko Arnautovic, Javier 'Chicharito' Hernandez, Joe Hart, and Pablo Zabaleta in the current transfer window, which will increase the competition for places.
However, Bilic is aware of the effect new signings have and wants the players to fight for their place in the team.
"All the players are happy now," Bilic told the club's official website. "It's a pre-season and it's the same in every club – they train brilliantly and all that and they are all hoping they are going to play and be starters in our team.
"Then, of course, only eleven or maybe 14 will think ‘I'm there' probably, almost definitely, some players will notice that they are not regulars in the beginning of the season, so maybe a few of them will not be happy and some of them will ask for a move, so we've got to be ready for that.
"It's my job to think about the team first and foremost and you have to expect these things to happen in every club. When it happens, you have to be ready with some players that are interesting for us and who are not going to be regulars at their clubs!"