Rangers and Celtic are driving each other to relentless form, but we should embrace challenge from Gers this weekend, says Motherwell boss

Motherwell boss Stuart Kettlewell reckons Rangers and Celtic are driving each other to their relentless form in the Scottish Premiership this season.

But he insists clubs should relish the chance to be the ones who can put an end to their incredible runs in the top flight.

The Steelmen welcome Michael Beale's Rangers to Fir Park on Saturday with the Ibrox club yet to lose in 13 league games under the new boss, who replaced Gio van Bronckhorst in November.

The only time Rangers haven't managed a Premiership win in that period was in a 2-2 draw with their greatest rivals in January.

Across Glasgow, Celtic are on an even better run with 20 wins from their last 21 games helping them to a nine-point lead over Rangers at the top of the table.

Kettlewell is preparing for his toughest test since taking the reins at Fir Park and knows his four-game unbeaten start will come under severe pressure, as 'Well haven't beaten Rangers at home in the top flight since December 2002.

And the 38-year-old, who will take his side to Celtic Park next month, insists both clubs are pushing each other to levels not seen in years.

Kettlewell said: "The standards and their levels are incredible. I think one of the biggest differences that I have picked up on in the period I have been out [of the game], and you analyse and look at all clubs, is their relentless nature in games.

"I feel at times clubs have played against Rangers and Celtic in the past when they have been very good teams.

"They have been able to create chances against you, they've dominated a lot of the ball - and that is stuff we still see - but I feel that now there is a real intent and purpose to score a goal every single time they come forward.

"Maybe in the past - and this isn't