Last updated on .From the section Scottish Premiership

Celtic returned to the Scottish Premiership summit after a first-half blitz ensured victory over Motherwell.

The win, coupled with Rangers' draw with Hibernian, means they lead their Old Firm rivals by a point with a game in hand.

Anthony Ralston opened the scoring before Scott Sinclair's penalty made it two just four minutes later.

Celtic lost striker Odsonne Edouard to injury, but replacement Mikey Johnston slammed in a third before the break.

Brendan Rodgers' side host Dundee on Saturday, before trips to face Aberdeen and then Rangers before the winter shutdown.

Motherwell remain ninth, nine points behind Hibernian in eighth, but five clear of Hamilton in 10th.

Celtic youngsters mask Edouard blow

After using a somewhat unfamiliar system in defeat by Hibernian on Sunday, Rodgers brought in 20-year-old Ralston to play on the right of a back four.

The impact was clear as, on his first start of the season, Ralston surged up and down the flank causing Motherwell all sorts of problems, not least sliding in the opening goal after Edouard had shrugged off several defenders and crafted an excellent ball through.

It was fantastic forward play from the Frenchman, and the kind Celtic will fear they may be without for the festive fixtures - including against Aberdeen and Rangers - after he limped off clutching a thigh.

By that point, though, Sinclair had already struck a penalty precisely past Mark Gillespie to make it 2-0, after Charles Dunne scythed down James Forrest.

Motherwell were suddenly buried after being largely untroubled by Celtic for nearly half an hour. And to compound matters, Edouard's replacement - 19 year-old Johnston - dropped a shoulder and shuffled on to his right foot to bamboozle Motherwell centre-back Carl McHugh before lashing in a third.

Johnston's impact in a comfortable victory may have made Edouard's absence look insignificant, but with Moussa Dembele sold in the summer and Leigh Griffiths taking an indefinite break from football, Celtic could face real problems in the striking department if the 20-year-old's injury prognosis is serious.

As it happened, Olivier Ntcham, playing in a more attacking midfield role with Callum McGregor deeper, provided Celtic's main threat after the break.

The Frenchman first struck a low drive just past a post and, when played through, searched for the far corner with a fizzing shot, but Gillespie did well to deny him.

For Motherwell's part they rarely threatened, and will be glad to have got through the game conceding just three after briefly collapsing in the 15 minutes before the break.

Johnston is a huge talent - Rodgers

'Celtic will want January reinforcements' - analysis

BBC Scotland's Martin Dowden at Celtic Park

Celtic are back on top of the Premiership with their 100% home record intact. That's now eight league wins from eight at Celtic Park, and 17 goals in their last four home games.

On a night that saw captain Scott Brown make his 500th Celtic appearance, the champions' record was never really under threat.

The injury to Edouard is the big concern though. In his place, Johnston certainly made an impact with a stunning third but with big games coming up, there are a lack of striking options.

Celtic will want to end December top of the table before regrouping and reinforcing in the January transfer window.

'Great to see youngsters do well' - reaction

Celtic manager Brendan Rodgers: "I thought it was an excellent performance, there were some very good moments in the game.

"A lot of our play was very good considering the games the players have been playing. It was great to see the young players coming into the team and doing well."

Motherwell manager Stephen Robinson: "We've got three big games coming up. I made a lot of changes so people would be fresh for Saturday. Anything from tonight would have been a bonus.

"But I'm a little bit disappointed because had we shown the bravery on the ball we did in the second half, we might have got something."