Paul Lambert has called out a "fear factor" in Rangers' recent displays as he backed Celtic to win the Scottish Premiership title.

The Parkhead legend reckons his former club have the upper hand in the race for the league crown but suggested everything will come down to the final derby between Celtic and Rangers.

Celtic are currently three points ahead in the league table but will play Rangers once more in the league - at Parkhead on Saturday, May 11.

And Lambert is confident Celtic will come through the fixture with their title hopes in tact as he cited a "fear factor" shown by Rangers in recent results against Ross County and Dundee before returning to winning ways against St Mirren.

On talkSPORT, Lambert commented: "The one at Parkhead I think is going to be pivotal to what is going to happen. I think whoever wins that will win the title.

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"I think Celtic are favourites, they are in the driving seat. Rangers had a fear factor in the last few games where they have not got the points where Celtic have kicked on again.

"I think Parkhead will be formidable for Rangers to get a result.

While Lambert is fairly confident heading into the derby encounter at Celtic Park, he admitted the Scottish Cup final could go either way.

The former St Mirren player claims the 50-50 ticket split at Hampden for the showpiece final evens the odds unlike with only home supporters for the final league meeting.

He added: "The Scottish Cup final could go either way because of the  50-50 split but I just think Celtic, at the minute, have got the upper hand."