Manchester United are on course to qualify for the quarter finals of the Champions League.
United lead Olympiakos by two goals to nil at half time in this round of 16 return at Old Trafford.
The Red Devils lost by 2-0 in the first leg and so need another goal to copperfasten their place in the last eight.
Utd have the Greek right back Holebas to thank for their lead as he pushed Robin van Persie in the penalty area as the Dutchman was under pressure to control a high pass.
van Persie picked himself off the floor and rifled the penalty kick into the top right hand corner of the net for the 25th minute opener.
Olympiakos should have equalised but Utd's Spanish keeper David de Gea kept them in the game with a fantastic double save from a header and then a follow up shot.
And Utd got a perfect boost going into the interval with Wayne Rooney squaring the ball from the right and there was van Persie to drill home into the same corner.
So it's game on in Manchester !
