Drewett says his side will face a huge task to beat Northampton

The Chiefs beat Nottingham 16-8 to set up the Twickenham tie against the unbeaten Saints, who are looking for a league and cup double.

"We know they're an outstanding team and we're going to have to work hard this week," he told BBC Radio Devon.

"But it's our opportunity and we'll have a real good go at it."