Rangers boss Walter Smith believes this weekend's Old Firm derby will not decide the destination of the SPL title.

Victory for Celtic at Ibrox on Saturday would give Gordon Strachan's men a four-point lead at the top of the table with just three games to play and put them on course for a fourth successive title.

But Smith, who won nine titles in a row during his first spell at the club ? said: "I don't think we can disregard the other teams, especially this season.

"We can't run away from the fact that it's going to be a vitally important match for both teams in the quest to win a championship.

"But the three remaining matches both teams have we have will be extremely tough."

Rock-bottom Falkirk travel to fellow strugglers Kilmarnock while St Mirren welcome Motherwell to Greenhill Road.