Chris Paterson admits Scotland must get the basics right if they are to end England's Grand Slam dream on Sunday.
Martin Johnson's England can move within one win of the RBS Six Nations title clean-sweep they can see off the Scots at Twickenham this weekend.
Andy Robinson's men head south having not won on England's turf since 1983 and the full-back insists it is imperative they start well.
"It's a huge challenge for us. England, quite rightly, are favourites," said Paterson, who has tasted three Calcutta cup victories in his career.
"We'll be underdogs and we'll be fighting with everything we have in order to get that victory on Sunday afternoon. The games are so intense that anything can happen.
"It is so tight and games are won and lost on such fine margins that you have to get your own game right, you have to execute things well, we have to start well - something we've not done particularly well - and put England under pressure.
"England are playing a game that really suits them at the moment and are playing really well."
Scotland's defeats to France, Wales and Ireland have stemmed from their attack relinquishing possession and allowing the opposition to exploit their disorganised defence.
Paterson knows if Scotland make the same basic handling errors this weekend they will be on the receiving end of a heavy defeat, with the likes of Chris Ashton, Ben Foden and Mark Cueto ready to pounce.
"They are quality strike-runners and we'll have to be at our best to shut them out," added the 32-year-old Edinburgh veteran.
"The way England are playing and the confidence they have they can capitalise on any mistake.
"What everyone looks for in the ideal game is a balance, playing good territory, good possession and making good decisions at crucial moments.
"Hopefully we can find that balance on Sunday."