The Egyptian international arrived at Spurs Lodge on Tuesday and was straight into his rehabilitation programme to recover from the groin strain that is likely to keep him out for another four weeks.
Snapped-up in the January transfer window from Dutch side Feyenoord, Hossam is determined to get his Spurs career moving but Martin says he has to be right.
"We knew he had a groin injury and he was going to be out for four to six weeks when we signed him,Ã¢â‚¬Â said Martin.
"Hossam is very eager to get going and wants to train as soon as possible.
"First we have to make sure he is fully fit and to help him cope with the English game because if you are not fully fit in the Premiership you can fall back a step or two straight away.
"Hossam is a very good athlete, a good runner, quick and very skilful. HeÃ¢â‚¬â„¢s good on the ball and a very good in the air as well. He has the ability to jump high and that's one of his main assets."
Martin Jol insists his first priority is to get Hossam Ghaly fully fit and ready for the challenge of the Premiership.