Ronny Deila admits Patrick Roberts will be hard to leave out of his Celtic side after the on-loan winger scored a double in the 3-1 win over Hearts at Parkhead which took the Hoops seven points clear at the top of the Ladbrokes Premiership.
Jamie Walker fired the visitors ahead in the sixth minute before Gary Mackay-Steven cancelled it out in the 15th minute.
Roberts had the Hoops ahead at the interval with his first senior goal, a dink over Neil Alexander, and the 19-year-old grabbed his second four minutes after the restart as the Bhoys stretched their lead over Aberdeen.
Hearts defender Juwon Oshaniwa was sent off in injury-time for picking up the second of two yellow cards.
It was only Roberts' second start since joining from Manchester City in January on an 18-month loan deal and Deila said: "He was very good. He was involved maybe seven or eight times and scored twice, what more can you expect?
"It will be hard to leave him out. Every time he has it in the right places, something happens. We need to keep feeding him the ball. I went to watch him in the (England) Under-19s on Tuesday against Spain, that was good for me to see him there as well.
"He is an important player for us but we have many good players. We have three games so we will see what we will do."
Just before the break Celtic midfielder Tom Rogic clashed heads with Oshaniwa, with the Hearts player being booked as he waited to come back on to the field with a bandage on his head.
Australian Rogic also received treatment but played on only for a few more minutes.
Deila said: "He was dizzy and I had to take him off, he couldn't answer the right questions. He knew the score but I asked him if we had to change or not and he shrugged. We had to take him off. I think it is okay."
Hearts head coach Robbie Neilson was miffed that Hoops skipper Scott Brown escaped any punishment for a sliding challenge on striker Juanma.
He said: "I felt there should be (some sort of action) but it's Parkhead, it doesn't happen, you just need to accept it."