Rangers, who play Club Brugge in a pre-season friendly on Sunday, start their competitive campaign at home to Panathinaikos in just over two weeks time.
“We’re also at a disadvantage because we play so early in Europe. We are trying to work when everyone else is on holiday,” Martin said.
The former Scotland and Rangers defender outlined his requirements for new arrivals.
“People need to be desperate to play for this club and not just be an option and one of a few options,” Martin explained.
“We have to be ready to win early, but we also need to be in a position to help the whole football club with players who can come here, develop whilst winning, and be good business. Every club has to look at that model.”
Football ability would not be enough to convince Martin a player is right for Rangers.
“Can you come here and add to us as a group in terms of your behaviour, the way you train, the way you work and who you are as a human being, your willingness to play in a way that we want to, which is not for everyone because it’s not easy?” he added.
“Also playing for this football club will not be for everyone. Character first and then talent after and, if we get both, we’ll be really happy.”
Watch all your favorite Amazon Prime Video Sports broadcasts live and free. Get access to NFL, NBA, NASCAR, WNBA, and more – all included with your Prime membership!