Former Scotland coach Jim Telfer has described England as being arrogant and Wales as 'lazy' ahead of the start of the Six Nations.
Telfer coached Scotland to a Grand Slam in 1984 and was part of the coaching set-up for the country's 1990 success, along with coaching the Lions forwards on their successful tour of South Africa in 1997.
With the Calcutta Cup looming this weekend, Telfer has stoked the fires by labelling England as "too arrogant, pretentious and condescending" ahead of this weekend's clash at Twickenham.
"England are not as good as they think they are," said Telfer to the Daily Mail.
"They were really up for it against New Zealand, very physical against a tired team. If they had played another five times, the All Blacks would have won them all. You have to retain perspective.
"In their favour is the coaching team of Stuart Lancaster, Graham Rowntree and Andy Farrell. All from the North and all down to earth. They will not let that victory go to their heads.
"The players are a different matter, people like Chris Ashton, Danny Care, Ben Youngs and Manu Tuilagi. They are young, very impressionable and they think what they read is all true.
"There is the makings of a good squad, but it is not good at the moment. Like the English football team, a couple of wins and they think they are world-beaters.
"Unless they are careful they will end up playing in a very English way. The way Saracens play. Pretty boring. The Northampton way. Boring. It is all about forward domination, and the irony is that England have some bloody good backs."
As for Wales, held nothing back when describing the 2012 Grand Slam champions.
"Wales is not an easy country to coach because, basically, the Welsh are lazy," added Telfer.
"Coaching them, playing against and with them, I realised they had reached the top because they were the cream and had not necessarily worked all that hard to get there. Wales do produce very good rugby players."