Michael Halliday scored twice as Glentoran overcame Cliftonville with a fine second half display at the Oval.
Gary Hamilton scored the opener for Glentoran
After a scoreless first half Gary Hamilton scored on 51 minutes with a shot which swerved viciously past John Connolly for his 20th of the season.
Willo McDonagh headed in a Sean Ward cross on 59 and Halliday nodded in after good work by Jason Hill after 75.
Ronan Scannell rammed home from five yards on 77 and Halliday finished calmly for the fourth on 80 minutes.
Chris Morgan shot wide of the post for the Glens early in the game and Hamilton then squared the ball to Halliday when a shot at goal appeared the better option.
Gary Kennedy had a chance for the Reds while Conor Downey was denied by a good save from Elliott Morris.
Halliday and Paul Leeman had goalbound efforts blocked by defenders, Morgan was off target again and Connolly managed to get to the ball with Peter McCann looming.
In the second half Halliday passed to Hamilton when he should have scored himself but soon after Hamilton broke the deadlock.
David McAlinden saw his header brilliantly saved by Morris before McDonagh made it two and Halliday added the third.
Scannell picked up the ball to grab a consolation after an assist by Sean Cleary but Halliday was on target again.