Celtic closed the gap at the top of the SPL to eight points with a comfortable 2-0 victory over Hearts at Celtic Park last night. Robbie Keane made his home debut and whilst he didn't manage to get himself on the scoresheet his manager is confident that Robbie will hit top form soon. Robbie Keane foiled again by the Hearts defenceRobbie Keane finally pulled the famous green and white hoops over his head last night as he made his Celtic Park debut. The Irish international had a host of chances to net against an insipid Hearts side in the SPL clash but unfortunately he failed to cap an otherwise great performance with a goal. Glenn Loovens and Marc-Antoine Fortuné scored the goals that put the Celts on easy street but manager Tony Mowbray insists that Keane's ability will ensure plenty of goals in the near future."On another night he could have scored three or four goals." said the boss. "Somewhere along the way somebody will feel the evidence of that, the quality he possesses to get in to those goal scoring positions. Hearts made it frustrating for us, yet we could have scored a couple in the first half. Robbie Keane's a bit frustrated in the dressing room, but it will come for him. He's getting into fantastic areas and had a few one-on-ones with the keeper tonight, who made some good saves.""It was a professional performance," he continued. "Once we got the two goals, it opened the game up and we could have scored one or two more. But this team will only get better. They have been thrown together and have only had three or four training sessions. Some hit the ground running while some take it a little bit longer. And we also saw the fantastic support we get when the team scores goals and the result goes our way." "I'd like to think Aiden McGeady is reaping the benefits of being on the bench for a game or two." said Mowbray. "Now he doesn't have to be the sole contributor to creative play because we have other footballers who can do that. But there were a lot of impressive performances out there for us and we'll get better the longer we have to work with the players. Every point dropped by Rangers is important as we try to chip away at their lead, but we have to look after our own game."