Ruth Davidson last night insisted Theresa May is not a 'wobbler'
The Scottish Tory leader rallied to Mrs May defence after Labour leader Jeremy Corbyn joined Wednesday's seven-way debate organised by the BBC in last minute change of plan.
Home Secretary Amber Rudd widely won plaudits for representing Mrs May, just 48 hours after the death of her father.
Ms Davidson was last grilled over rivals criticism of Mr May when she appeared on BBC Scotland's Ask the Leader programme.
Referring to the Channel 4 leaders interviews earlier this week one audience member asked: "How she's going to be able to stand up to the remaining EU countries when she can't even stand up to Jeremy Paxman?"
But Ms Davidson took aim at the Labour leader and added: I have seen Theresa May work, I have seen the application she has put in, the hard work she does, the diligence that she has in Number 10. I think she will absolutely rise to the challenge."
Ms Davidson was last grilled over rivals criticism of Mr May
She was pressed by presenter Glenn Campbell over the Prime Minister's campaign slogan of "strong and stable" leadership.
Do you think she is a wobbler?
He asked: "Was it was strong not to turn up to the BBC debate?"
Ms Davidson insisted there was no UK wide convention for the head to head showdowns.
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Ms Davidson was pressed on the PM's slogan 'Strong and stable'
She also said Mrs May was "grasping the nettle" over tough questions following the U-turn on social care south of the Border and vetoing SNP demands for another independence referendum.
Mr Campbell said: "Do you think she is a wobbler?"
But Ms Davidson said: "Absolutely not. She certainly has not been when it comes to independence."