Former Socceroo Harry Kewell is rated only a 50-50 chance by John Aloisi Melbourne Heart's Harry Kewell has not trained this week due to a neck injury and won't be risked against the Mariners. MELBOURNE Heart coach John Aloisi rates Harry Kewell only a 50-50 chance of playing in the second-round match against Central Coast at AAMI Park today. But he has refused to rule him out as the Victorians look to break the poor run of results against the defending champion. Kewell hasn't trained all week after receiving a neck injury in the season-opener 0-0 draw with Melbourne Victory, heightening suggestions the former Socceroo won't take his spot in the line-up. However, Aloisi hasn't given up on the 35-year-old and says he will be given up until the last minute to prove his fitness. "He is still struggling and I have to say he is 50-50 at the moment," Aloisi said yesterday. We will look at him tomorrow, give him a bit of a test and see what happens. It would be terrific to have him available. He showed good signs last week (against Victory). Aloisi set the scene for an interesting game against the Mariners after suggesting they had helped turn the corresponding game last season into a dull affair. "Tomorrow will be a different affair (to the game against Victory)," he said. The Mariners will come here and sit off us. They always do that here. Last year they made it into a dull affair. We had the best chances but missed and then they scored from a free kick. They won't set up any different, but we have got the players I believe can dictate the game. However, Aloisi warned that his team must show patience against a side he believes will be a force again this season. It will be a tight game. They are defensively well organised and are always hard to play against," he admitted. It will be a good test for us to see how much we have improved from last season. The thing is, we will need to be patient. We can't get frustrated and play balls that are not on. We have to wait for the right opening. Aloisi said he had not made up his mind in terms of his final line-up. Either Ian Ramsay or youngster Stefan Mauk is likely to take Kewell's spot if he isn't fit. "I've got options," he added. Ian Ramsay can do the job. I could shift a couple or players around, and Stefan Mauk is a chance. But Nicky Kalmar won't start. He has had a very disrupted pre-season and is still finding his fitness. If he got a run it would be from the bench and for 15 or 20 minutes. Aloisi has definitely ruled out Maltese international striker Michael Mifsud, who played for Malta in two World Cup qualifiers this week. But he says he has enough firepower to cope against the Mariners. "He won't be back in time," Aloisi said. I'd love to have him. He scored against the Czech Republic the other day. He will be right for the Perth game next week. We have players who can score goals. Ian Ramsay scored seven for Adelaide last season and Gol Gol (Mebrathu), David Williams and Mate Dugandzic can get the job done, too.